When flexibility is not necessarily a virtue: a review of hypermobility syndromes and chronic or recurrent musculoskeletal pain in children
© Cattalini et al. 2015
Received: 25 March 2015
Accepted: 1 October 2015
Published: 6 October 2015
Chronic or recurrent musculoskeletal pain is a common complaint in children. Among the most common causes for this problem are different conditions associated with hypermobility. Pediatricians and allied professionals should be well aware of the characteristics of the different syndromes associated with hypermobility and facilitate early recognition and appropriate management. In this review we provide information on Benign Joint Hypermobility Syndrome, Ehlers-Danlos Syndrome, Marfan Syndrome, Loeys-Dietz syndrome and Stickler syndrome, and discuss their characteristics and clinical management.
Chronic or recurrent musculoskeletal pain is a common complaint in children, affecting between 10 % and 20 % of children. It is one of the more frequent reasons for seeking a primary care physician’s evaluation and possible rheumatology referral [1, 2]. A wide variety of non-inflammatory conditions may cause musculoskeletal pain in the pediatric age, and the most common causes seen by paediatric rheumatologists include conditions associated with hypermobility. Hypermobility may have a significant impact on quality of life of affected children and their parents, even in the milder forms . All physicians and allied professionals that may be involved in the care of children with musculoskeletal complaints should therefore be well trained to recognize hypermobility and to run the differential diagnosis between the various clinical entities associated with it. A critical approach to a child with hypermobility is crucial to correctly identify the underlying cause and avoid time/money- consuming investigations.
In this paper we review different etiologies of musculoskeletal pain associated with hypermobility, including some genetic disorders, and discuss the clinical approach in these children.
Benign joint hypermobility syndrome (BJHS)
Children with hypermobile joints by definition display a range of movement that is considered excessive, taking into consideration the age, gender and ethnic background of the individual. It is estimated that at least 10–15 % of normal children have hypermobile joints and the term joint hypermobility syndrome (JHS) is reserved to the cases of joint hypermobility associated with symptoms with no other causes found for them [4–6]. JHS can be associated with hereditary connective tissue disorders, and the term “Benign” is used in contrast to more serious and potentially complicated or life-threatening musculoskeletal syndromes such as some forms of Ehlers-Danlos syndrome (EDS), Marfan syndrome, and Loeys-Dietz syndrome. The prevalence of JHS is not known with precision, given the lack of studies of large cohorts. Sperotto et al., conducted a cross sectional study in a cohort of healthy schoolchildren, aged 8–13 years from the province of Padua, Italy, and found that BJHS occurred in the 13,2 % of the 289 children evaluated .
Even if BJHS is very common, this condition is largely under-recognized by primary care physicians and often poorly managed. Symptoms frequently start in childhood and continue into adult life. The pathophysiology of benign joint hypermobility is unclear. Hypermobility is more common in childhood and adolescence, in females, and in some ethnicities, and it tends to lessen during adulthood. Still, polyarticular hypermobility may be present in up to 30 % of males and 40 % of females during early adulthood . For the majority of individuals joint hypermobility may be of no consequence, and what brings a proportion of subjects to develop BJHS is not fully understood. BJHS seems to be transmitted by an autosomal pattern, and first-degree relatives with the disorders can be identified in many cases. Variable penetrance is generally observed . With the exception of a minority of patients, who show a deficiency of tenascin X, no abnormality in collagen or related proteins has been identified as a cause for BJHS . Joint pain is thought to be caused by excessive movement, increasing stress on joint surfaces, ligaments and adjacent structures. Other factors may contribute to the development of the syndrome, such as poor proprioception, autonomic dysfunctions and fatigue secondary to poor sleep .
The predominant presenting complaint is pain, which may be widespread and debilitating. The pain typically starts during or after activity. The most common affected sites are the lower limbs after walking (for example walking to and from school). Children usually report excess fatigue, handwriting difficulties or ‘clicking or cracking’ joints. Occasionally episodes of joint swelling lasting hours to days, joint dislocations, or more commonly subluxations with spontaneous reduction are reported. Back-pain is also a common complaint because the lumbar spine is one of the most mobile sections of the vertebral column and the excessive movements may lead to pain in hypermobile subjects. Heavy school bags are often an aggravating feature. Chronic pain results in a reduced exercise tolerance and can negatively impact patients’ life.
A significant proportion of subjects progressively quit sports and other physical activities. In addition, pain amplification is a common feature in these cases . BJHS has been considered to cause only musculoskeletal symptoms for many years, but there is now mounting evidence that many other extra-skeletal manifestations may occur. This symptoms arise usually after the third decade of life, but have been described in adolescents, and may be due to connective tissue abnormalities, linking BJHS and other hereditary disorders of connective tissues, namely Ehlers-Danlos syndrome type III. These include functional and anatomic gastrointestinal tract abnormalities (constipation, bloating, diarrhea, hiatal hernias), autonomic dysfunctions (postural tachycardia syndrome, palpitations, orthostatic intolerance, headache, fatigue) and skin abnormalities (easy bruising, striae) [13, 14]. Some of these symptoms are overlapping with those observed in Juvenile Fibromyalgia (JFM), and indeed there are few reports describing high incidence of BJHS in children with JFM. Furthermore, children who have both JFM and BJHS may exhibit lower tender-points thresholds and a greater number of tender-points compared to children with JFM but no benign joint hypermobility .
Beighton scoring system for joint hypermobility (adapted from Junge et al. )
Scoring 1 point each side
1. Passive dorsiflexion of the 5th metacarpophalangeal joint to >90°
2. Passive apposition of thumb to the flexor aspect of forearm
3. Hyperextension of the elbow >10°
4. Hyperextension of the knee >10°
Scoring 1 point
5. Flexion of the trunk with knees straight and both palms resting easily on floor
The Brighton criteria for the diagnosis of BJHS (adapted from Graham et al. 
1. A Beighton score of 4/9 or greater (either currently or historically)
2. Arthralgia for longer than 3 months in four or more joints.
1. A Beighton score of 1,2, or 3/9 (0,1,2,or 3 if aged 50+).
2. Arthralgia (for 3 months or longer) in one to 3 joints or back pain for (for 3 months or longer), spondylosis, spondylolysis/spondylolisthesis.
3. Dislocation/subluxation in more than one joint, or in one joint on more than one occasion.
4. Soft tissue rheumatism: three or more lesions (e.g., epicondylitis, tenosynovitis, bursitis).
5. Marfanoid habitus (tall, slim, span/height ration >1.03 upper: lower segment ration less than 0.89, arachnodactyly (positive steinberg/wrist signs).
6. Abnormal skin striae, hyperextensibility, thin skin, papyraceous scarring.
7. Eye signs: drooping eyelids or myopia or antimongoloid slant.
8. Varicose veins or hernia or uterine/rectal proplapse.
BJHS is diagnosed in the presence of two major criteria or one major and two minor criteria, or four minor criteria. Two minor criteria will suffice where there is an unequivocally affected first-degree relative.
The management of individuals with BJHS can be very challenging and there are no evidence-based management strategies currently available. Acute pain episodes are commonly managed using taping, bracing or splinting or with non-steroidal anti-inflammatory drugs as needed. However reassurance and a multi-disciplinary training program are the mainstays of long term management. Physical therapy is of the outmost importance, and encouraging an active lifestyle may improve function and enhance quality of life . As general principles, strengthening exercises focused on muscles around hypermobile joints may help to enhance joint support throughout movement and reduce pain; closed chain exercises may enhance proprioceptive feedback and optimize muscle action. Proprioception may be improved also by coordination and balance exercises. Physical therapy should also encompass a generalized exercise programme, addressing cardio-respiratory, musculoskeletal and neurological aspects of movement with the aim to reduce deconditioning . As already mentioned, the Health Related Quality of Life in children with hypermobility and their parents may be worse than that of healthy controls and this may well be secondary to the presence of chronic pain and fatigue, that act as stressors in everyday life. This is an important aspect to consider for physicians approaching a child with BJHS, that should not underestimate the burden of this condition, often interpreted as benign and not worth any intervention .
Ehlers-Danlos Syndromes (EDSs)
Ehlers-Danlos Syndromes classification (adapted from Beighton P et al. )
Classic (type I/II)
Type V procollagen (~50 %)
Widened atrophic scarring
Smooth and velvety skin
Complications of joint hypermobility
Positive family history
Hypermobility (type III)
Generalized joint hypermobility mild skin involvement
Recurring joint dislocations
Tenascin X (~5 %)
Chronic joint pain
Positive family history
Vascular (type IV)
Type III procollagen
Thin, translucent skin
Early-onset varicose veins
Arterial/intestinal/uterine fragility or rupture
Hypermobility of small joints
Characteristic facial appearance
Tendon and muscle rupture
Arteriovenous or carotid-cavernous sinus fistula
Positive family history, sudden death in close relative(s)
Kyphoscoliotic (type VI)
Severe muscular hypotonia at birth
Tissue fragility, including atrophic scars
Type VIA: Lysyl hydroxylase 1
Generalized joint laxity
Kyphoscoliosis at birth
Scleral fragility and rupture of the globe
Type VIB: not known
Arthrochalasis (type VII A & B)
Severe generalized joint hypermobility with recurrent subluxations
Type I procollagen
Congenital bilateral hip dislocation
Tissue fragility, including atrophic scars
Dermatosparaxis (type VII C)
Severe skin fragility
Soft, doughy skin texture
Sagging, redundant skin
Premature rupture of membranes
The connective tissue fragility follows abnormalities in the expression or structure of the fibrillar collagen types I, III and V, as well as enzymatic abnormalities in the post-translational modification and processing of these collagens. Mutations in the COL5A1 and COL5A2 genes, encoding the α1- and the α2-chains of type V collagen, respectively, are found in approximately 50 % of individuals with the classic type of EDS. Mutations in TNX-B, encoding for Tenascin X, in approximately 5 % of patients with the hypermobility type, while vascular EDS is caused by heterozygous mutations in the COL3A1 gene, encoding type III collagen [23, 24].
The clinical spectrum of EDSs varies from mild skin and joint hyperlaxity to severe physical disability and life-threatening vascular complications. The classic, hypermobility and vascular subtype of EDS are the most common, whereas the kyphoscoliosis, arthrochalasis and dermatosparaxis types are very rare conditions. The diagnosis of the autosomal dominant (AD) classic subtype of EDS requires the presence of skin hyper-extensibility, widened atrophic scars and joint hypermobility. These are the three major diagnostic criteria, next to a series of ‘minor’ diagnostic manifestations. Characteristic facial features include epicanthic folds, excess skin over the eyelids, presence of dilated scars on the forehead and vaulted palate. Joint hypermobility is usually generalized and can vary in severity and with age. At birth, uni- or bilateral dislocation of the hip may be present. Even if the hypermobility is asymptomatic, this condition can result in childhood in congenital club foot, pes planus and joint effusions. In young adulthood the classic subtype can be complicated by repetitive subluxations and dislocations either spontaneously or after minimal trauma. Patients usually report chronic and recurrent pain that is difficult to treat and premature osteoarthritis is a major concern. One of the most typical features is the skin hyper-extensibility, which means that the skin stretches easily but snaps back after release. The skin is often smooth and velvety to the touch  (Fig. 4).
For pediatric rheumatologists, a real diagnostic challenge is represented by the hypermobility subtype of EDS (EDS-HT), which is by far the most common subtype. The genetic basis of EDS-Hybermobile is largely unknown and a reliable diagnostic test for this EDS subtype is lacking . According to the Villefranche classification, the major diagnostic criteria are generalized joint hypermobility and presence of typical skin manifestations. However, these features are usually more subtle than in the classic type of EDS but these criteria are nevertheless helpful to differentiate this form of EDS from the more common “Benign joint hypermobility syndrome (BJHS)” . It is still a matter of debate if EDS-HT and BJHS really represents two different diseases or if they should be reviewed as a spectrum of a single entity, sharing common genetic bases and showing considerable variability in clinical presentation, between as well as within families.
Joint hypermobility is typically limited to the small joints of the hands in the vascular subtype. This subtype has the worst prognosis because of a high rate of spontaneous arterial rupture usually in the third or the fourth decade of life. Unlike other EDS types, the skin is not hyper-extensible, but rather thin and translucent, showing a visible venous pattern over the chest, abdomen and extremities. Excessive bruising is the most common sign and is often the presenting complaint, especially in children. Other early manifestations include premature rupture of the membranes, congenital clubfoot or congenital hip dislocation, inguinal hernia, and severe varicosities. The facial and cutaneous features may be very subtle or even absent . If there is a strong clinical suspicion of vascular EDS, direct DNA analysis is mandatory, even in the absence of an abnormal biochemical abnormality.
The management of children with Ehlers-Danlos syndromes requires a multidisciplinary approach. Children with pronounced skin fragility should be advised to avoid contact sports and to wear protective pads or bandages in order to prevent bruises and hematomas. Cutaneous stitches should be left in place twice as long as usual, and additional fixation of adjacent skin with adhesive tape can help to prevent stretching of the scar. In children physio-therapeutic support is important. Acetaminophen should be preferred over NSAIDs for joint pain and thus minimizing the risk of easy bruising due to platelet disfunction. For the same reason COX-2 inhibitors may be an option, although no studies have been published on their use in EDS. Patients with mitral valve prolapse and regurgitation require antibiotic prophylaxis for bacterial endocarditis. A baseline echocardiogram with aortic diameters measurement is recommended before 10 years of age, with follow-up studies timed according to whether an abnormal measurement is found. A useful resource for these measurements is parameterz.blogspot.in. For the vascular and vascular-like types of EDS, some prophylactic measures are of particular importance. Invasive vascular procedures such as arteriography and catheterization should also be avoided because of the risk for life-threatening vascular rupture. Surgical interventions are generally discouraged because of increased vascular fragility, and conservative therapy is recommended [28, 29].
Marfan Syndrome (MS)
MS is an hereditary autosomal dominant, multisystem disorder of connective tissue with extensive clinical variability. It is a relatively common condition, with approximately 1 in 5000 people affected. This disease demonstrates autosomal-dominant inheritance with high penetrance and marked inter- and intra-familial variability . It is caused by defects in FBN1, the gene that codes for the protein fibrillin, although patients with mutations in other genes, including TGFBR1 and TGFBR2, have also been rarely reported . Mutations in FBN1 are associated with a wide phenotypic spectrum ranging from classic features of Marfan syndrome presenting in childhood and early adulthood to severe neonatal presentation . Advanced paternal age is a risk factor.
Cardinal features involve the ocular, musculoskeletal, and cardiovascular systems. Skeletal system involvement in Marfan syndrome is characterized by bony overgrowth; such overgrowth may be noticeable at birth or can develop in young children and results in disproportional long limbs. Frequent findings are pectus excavatum, pectus carinatum, scoliosis or spondylolisthesis, calcaneal displacement, “protrusio acetabuli”, arachnodactyly, and pes planus. Recently, Marfan patients have been reported to have reduced bone mass and muscle mass, compared to healthy controls. All this skeletal abnormalities may account for the very high incidence of severe daily pain that Marfan patients report .
Joint laxity may be significant in young MS patients and can lead to ligament injury, dislocations, chronic joint pain and degenerative arthritis . The facial features of Marfan syndrome include a long and narrow face with deeply set eyes (enophthalmos), downward slanting of the eyes, flat cheek bones (malar hypoplasia) and high arched palate . Ectopia lentis (i.e., lens dislocation) is a cardinal feature of Marfan syndrome and an ophthalmologic examination is mandatory in suspected cases. During early childhood, patients may occasionally present with isolated bilateral ectopia lentis . The cardiovascular involvement is particularly worrisome because the progressive aortic-root dilatation can lead to acute dissection, aneyrysms and sudden death. Although early diagnosis and refined medical and surgical treatment have improved survival, patients with Marfan syndrome continue to have high rates of cardiovascular disease and premature death .
The revised Ghent criteria for Marfan syndrome (adapted from Faivre L et al. )
In the absence of family history:
1. Aortic Root Dilatation Z score ≥ 2 AND Ectopia Lentis = Marfan syndrome.
2. Aortic Root Dilatation Z score ≥ 2 AND FBN1 mutations = Marfan syndrome.
3. Aortic Root Dilatation Z score ≥ 2 AND Systemic Score ≥ 7pts = Marfan syndrome.
4. Ectopia lentis AND FBN1 with known Aortic Root Dilatation = Marfan syndrome.
In the presence of family history:
1. Ectopia lentis AND Family History of Marfan syndrome (as defined above) = Marfan syndrome.
2. A systemic score ≥ 7 points AND Family History of Marfan syndrome (as defined above) = Marfan syndrome
3. Aortic Root Dilatation Z score ≥ 2 above 20 yrs. old, ≥ 3 below 20 yrs. old) + Family History of Marfan syndrome (as defined above) = Marfan syndrome.
Revised Ghent criteria: systemic feature score (adapted from Faivre L et al. )
Table 2: Revised Ghent Criteria: Systemic features score
• Wrist AND thumb sign – 3 (Wrist OR thumb sign – 1)
• Pectus carinatum deformity – 2 (pectus excavatum or chest asymmetry – 1)
• Hindfoot deformity – 2 (plain pes planus – 1)
• Pneumothorax – 2
• Dural ectasia – 2
• Protrusio acetabuli – 2
• Reduced US/LS AND increased arm/height AND no severe scoliosis – 1
• Scoliosis or thoracolumbar kyphosis– 1
• Reduced elbow extension – 1
• Facial features (3/5) – 1 (dolichocephaly, enophtalmos, downslanting palpebral fissures, malar hyoplasia, retrognathia)
• Skin striae – 1
• Mitral valve prolapse (all types) – 1
• Myopia >3 diopters – 1
Maximum total: 20 points; score ≥7 indicates systemic involvement
The Kids-Short Marfan score (adapted from Mueller GC et al. )
Risk category for likelihood of MFS
Dilatation of aortic root + Ectopia lentis
Very high risk
• dilatation of aortic root
High risk (Complete examination of all symptoms of the revised Ghent Criteria is strictly recommended as soon as possible. Patient should see Marfan Syndrome specialists)
+ mitral valve prolapse + tricuspid valve prolapse or
+ dilatation of pulmonary artery or
+ at least 3 skeletal features of the systemic score of the revised Ghent criteria
• Ectopia lentis
+ mitral valve prolapse + tricuspid valve prolapse or
+ dilatation of pulmonary artery
Family history dilatation of aortic root
Moderate risk (Patient needs to be verified or excluded with further diagnostic procedures other than or echocardiography and clinical examination)
Diagnosis and management require a multidisciplinary approach by geneticists, cardiologists, orthopedic surgeons and ophthalmologists with experience in this field. Cardiovascular follow-up should include serial evaluation with electrocardiography and serial cardiac imaging, especially CT/MRI angiography. Exercise restriction is wise and elective aortic-root replacement is sometimes needed . Infective endocarditis prophylaxis is indicated in those with valvular defects. Medical therapy with beta-blockers seems to be able to decrease aortic root enlargement, especially when started relatively early in the disease course, while the role of ACE inhibitors is still debated . Readers are referred to marfan.org, an excellent resource for both physicians and patients
Loeys-Dietz syndrome (LDS)
LDS is a recently described rare autosomal dominant connective tissue disorder characterized by a severe and widespread arterial involvement since childhood. Its exact incidence have not been established [42, 43]. The disorder is most often caused by heterozygous mutations in TGF-β receptors TGFBR1 and TGFBR2 . The classification depends on the presence or absence of craniofacial features (hypertelorism, bifid uvula and cleft palate). Affected individuals show generalized arterial abnormalities, ascending aneurysms and rapidly progressive aortic aneurysm . Skeletal features in all types of LDS may show overlap with Marfan syndrome (i.e., pectus deformity, arachnodactyly, scoliosis, and pes planus) but height and proportions are typically within the normal range. Joint hypermobility is also common. A more specific finding is the association of arachnodactyly with advanced carpal bone ossification and joint hyperextension [46, 47]. LDS diagnostic criteria have not been defined and confirmatory genetic testing is required. Management of LDS involves regular cardiology follow-up to establish the extent of vascular involvement, early surgical intervention, genetic counseling and monitoring in pregnancy. There is a higher risk of dissection compared to Marfan syndrome, and early surgical correction may be crucial. Aggressive medication regimens, with β-blockers and angiotensin receptor antagonists, is recommended as this treatment may halt disease progression and postpone surgical repair .
Stickler syndrome (SS)
SS is a multisystem connective tissue disorder that can affect the eye, craniofacies, inner ear, skeleton, and joints . Stickler syndrome has been associated with mutations of COL2A1, which encodes for the alpha-1 chain of type II collagen, COL11A1 gene, which encodes for the alpha-1 chain of type XI collagen, and COLL11A2 gene. Rarer autosomal recessive forms have been linked to mutation of the three genes encoding collagen IX: COL9A1-2-3. Variable phenotypic expression of Stickler syndrome occurs both within and among families [50–53].
Proposed diagnostic criteria for Stickler Syndrome type I (adapted from Robin NH et al. )
Stickler syndrome should be considered in individuals with ≥5 points At least one finding should be a major (2-point) manifestation.
Abnormalities (2-pt maximum per category)
○ Cleft palate* (open cleft, submucous cleft, or bifid uvula): 2 points
○ Characteristic facial features (malar hypoplasia, broad or flat nasal bridge, and micro/retrognathia): 1 point
• Ocular. Characteristic vitreous changes or retinal abnormalities* (lattice degeneration, retinal hole, retinal detachment or retinal tear): 2 points
○ High-frequency sensorineural hearing loss*: 2 points
▪ Age < 20 years: threshold ≥ 20 dB at 4–8 Hz
▪ Age 20–40 years: threshold ≥ 30 dB at 4–8 Hz
▪ Age > 40 years: threshold ≥ 40 dB at 4–8 Hz
○ Hypermobile tympanic membranes: 1 point
○ Femoral head failure (slipped epiphysis or Legg-Perthes-like disease): 1 point
○ Radiographically demonstrated osteoarthritis before age 40: 1 point
○ Scoliosis, spondylolisthesis, or Scheuermann-like kyphotic deformity: 1 point
Family history/molecular data**
• Independently affected first-degree relative in a pattern consistent with autosomal dominant inheritance or presence of a COL2A1, COL11A1, or COL11A2 pathogenic variant associated with Stickler syndrome**: 1 point
• *Denotes major manifestation ** Does not account for families with autosomal recessive Stickler syndrome
Musculoskeletal pain is one of the more common complaints in the pediatric population. It is common for parents of affected children to seek a pediatric evaluation, and commonly these children are referred to a rheumatologist. Among the leading non-inflammatory causes of joint pain seen by pediatric rheumatologists are those associated with hypermobility. Different diseases are associated with hypermobility. The musculoskeletal complaints are typical of non-inflammatory conditions, with the onset of pain that is typically exacerbated by exercise and is usually a late afternoon/evening pain, without the typical signs and symptoms of inflammatory arthropathies, such as joint swelling or morning stiffness. Inflammatory markers are invariably within normal limits. Many other clinical manifestations may enrich the clinical picture, based on the underlying cause. The presence of chronic pain secondary to hypermobility may have a profound impact on patients’ quality of life, leading to a high burden for patients, families and the health care system. Moreover, the genetic syndromes depicted in this review may have early and late severe complications. Pediatricians, and specifically pediatric rheumatologists, should therefore keep a high index of suspicion for early recognition of hypermobility-associated syndromes. It is essential that these physicians have expertise in developing an appropriate differential diagnosis in these children and distinguishing one musculoskeletal disease from another.
Written informed consent was obtained from the patient’s guardian/parent/next of kin for the publication of this report and any accompanying images.
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
- De Inocencio J. Epidemiology of musculoskeletal pain in primary care. Arch Dis Child. 2004;89(5):431–4.PubMed CentralView ArticlePubMedGoogle Scholar
- Gunz AC, Canizares M, Mackay C, Badley EM. Magnitude of impact and healthcare use for musculoskeletal disorders in the paediatric: a population-based study. BMC MusculoskeletDisord. 2012;13:98.View ArticleGoogle Scholar
- Pacey V, Tofts L, Adams RD, Munns CF, Nicholson LL. Quality of life prediction in children with joint hypermobility syndrome. J Paediatr Child Health. 2015;51(7):689–95.View ArticlePubMedGoogle Scholar
- Remvig L, Jensen DV, Ward RC. Epidemiology of general joint hypermobility and basis for the proposed criteria for benign joint hypermobility syndrome: review of the literature. J Rheumatol. 2007;34:804–9.PubMedGoogle Scholar
- Kirk JA, Ansell BM, Bywaters EG. The hypermobility syndrome. Musculoskeletal complaints associated with generalized joint hypermobility. Ann Rheum Dis. 1967;26:419–25.PubMed CentralView ArticlePubMedGoogle Scholar
- Simmonds JV, Keer RJ. Hypermobility and the hypermobility syndrome. Man Ther. 2007;12:298–309.View ArticlePubMedGoogle Scholar
- Sperotto F, Balzarin M, Parolin M, Monteforte N, Vittadello F, Zulian F. Joint hypermobility, growing pain and obesity are mutually exclusive as causes of musculoskeletal pain in schoolchildren. Clin Exp Rheumatol. 2014;32(1):131–6.PubMedGoogle Scholar
- Hakim AJ, Sahota A. Joint hypermobility and skin elasticity: the hereditary disorders of connective tissue. ClinDermatol. 2006;24(6):521–33.Google Scholar
- Hakim AJ, Cherkas LF, Grahame R, Spector TD, MacGregor AJ. The genetic epidemiology of joint hypermobility: a population study of female twins. Arthritis Rheum. 2004;50:2640–4.View ArticlePubMedGoogle Scholar
- Malfait F, Hakim AJ, De Paepe A, Grahame R. The genetic basis of the joint hypermobility syndromes. Rheumatology. 2006;45(5):502–7.View ArticlePubMedGoogle Scholar
- Smith TO, Jerman E, Easton V, Bacon H, Armon K, Poland F, et al. Do people with benign joint hypermobility syndrome (BJHS) have reduced joint proprioception? A systematic review and meta-analysis. Rheumatol Int. 2013;33(11):2709–16.View ArticlePubMedGoogle Scholar
- Armon K. Musculoskeletal pain and hypermobility in children and young people: is it benign joint hypermobility syndrome? Arch Dis Child. 2015;100(1):2–3.View ArticlePubMedGoogle Scholar
- Hakim AJ, Grahame R. Non-musculoskeletal symptoms in joint hypermobility syndrome. Indirect evidence for autonomic dysfunction? Rheumatology. 2004;43(9):1194–5.View ArticlePubMedGoogle Scholar
- Kovacic K, Chelimsky TC, Sood MR, Simpson P, Nugent M, Chelimsky G. Joint hypermobility: a common association with complex functional gastrointestinal disorders”. J Pediatr. 2014;165(9):973–8.View ArticlePubMedGoogle Scholar
- Ting TV, Hashkes PJ, Schikler K, Desai AM, Spalding S, Kashikar-Zuck S. The role of benign joint hypermobility in the pain experience in Juvenile Fibromyalgia: an observational study. Pediatr Rheumatol Online J. 2012;10(1):16.PubMed CentralView ArticlePubMedGoogle Scholar
- Junge T, Jespersen E, Wedderkopp N, Juul-Kristensen B. Inter-tester reproducibility and inter-method agreement of two variations of the Beighton test for determining Generalized Joint Hypermobility in primary school children. BMC Pediatr. 2013;13:214.PubMed CentralView ArticlePubMedGoogle Scholar
- Grahame R, Bird HA, Child A. The revised (Brighton 1998) criteria for the diagnosis of benign joint hypermobility syndrome (BJHS). J Rheumatol. 2000;27(7):1777–9.PubMedGoogle Scholar
- Juul-Kristensen B, Røgind H, Jensen DV, Remvig L. Inter-examiner reproducibility of tests and criteria for generalized joint hypermobility and benign hypermobility syndrome. Rheumatology (Oxford). 2007;46(12):1835–41.View ArticleGoogle Scholar
- Remvig L, Jensen DV, Ward RC. Are diagnostic criteria for general joint hypermobility and benign joint hypermobility syndrome based on reproducible and valid tests? A review of the literature. J Rheumatol. 2007;34(4):798–803.PubMedGoogle Scholar
- Palmer S, Bailey S, Barker L, Barney L, Elliott A. The effectiveness of therapeutic exercise for joint hypermobility syndrome: a systematic review. Physiotherapy. 2014;100(3):220–7.View ArticlePubMedGoogle Scholar
- Beighton P, De Paepe A, Steinmann B, Tsipouras P, Wenstrup RJ. Ehlers Danlos syndromes: revised nosology, Villefranche 1997. Ehlers Danlos National Foundation (USA) and Ehlers Danlos Support Group(UK). Am J Med Gen. 1998;77(1):31–7.View ArticleGoogle Scholar
- De Paepe A, Malfait F. The Ehlers-Danlos syndrome, a disorder with many faces. Clin Genet. 2012;82(1):1–11.View ArticlePubMedGoogle Scholar
- Malfait F, Wenstrup RJ, De Paepe A. Clinical and genetic aspects of Ehlers-Danlos syndrome, classic type. Genet Med. 2010;12(10):597–605.View ArticlePubMedGoogle Scholar
- Zweers MC, Bristow J, Steijlen PM, Dean WB, Hamel BC, Otero M, et al. Haploinsufficiency of TNXB is associated with hypermobility type of Ehlers-Danlos syndrome. Am J Hum Gen. 2003;73:214–7.View ArticleGoogle Scholar
- Tinkle BT, Bird HA, Grahame R, Lavallee M, Levy HP, Sillence D. The lack of clinical distinction between the hypermobility type of Ehlers–Danlos syndrome and the joint hypermobility syndrome (a.k.a. hypermobility syndrome). Am J Med Genet. 2009;149A:2368–70.View ArticlePubMedGoogle Scholar
- Rombaut L, Malfait F, Cools A, De Paepe A, Calders P. Musculoskeletal complaints, physical activity and health-related quality of life among patients with the Ehlers-Danlos syndrome hypermobility type. Disabil Rehabil. 2010;32(16):1339–45.View ArticlePubMedGoogle Scholar
- Callewaert B, Malfait F, Loeys B, De Paepe A. Ehlers-Danlos syndromes and Marfan syndrome. Best Pract Res Clin Rheumatol. 2008;22(1):165–89.View ArticlePubMedGoogle Scholar
- Freeman RK, Swegle J, Sise MJ. The surgical complications of Ehlers-Danlos syndrome. Am Surg. 1996;62:869–73.PubMedGoogle Scholar
- Milewicz DM, Dietz HC, Miller DC. Treatment of aortic disease in patients with Marfan syndrome. Circulation. 2005;111:e150–7.View ArticlePubMedGoogle Scholar
- Yang RQ, Jabbari J, Cheng XS, Jabbari R, Nielsen JB, Risgaard B, et al. New population-based exome data question the pathogenicity of some genetic variants previously associated with Marfan syndrome. BMC Genet. 2014;15:74.PubMed CentralView ArticlePubMedGoogle Scholar
- Aubart M, Gross MS, Hanna N, Zabot MT, Sznajder M, Detaint D, et al. The clinical presentation of Marfan syndrome is modulated by expression of wild-type FBN1 allele. Hum Mol Genet. 2015;24(10):2764–70.View ArticlePubMedGoogle Scholar
- Haine E, Salles JP, Van Kien PK, Conte-Auriol F, Gennero I, Plancke A, et al. Muscle and Bone Impairment in Children with Marfan Syndrome: Correlation with Age and FBN1 Genotype. J Bone Miner Res. 2015;30(8):1369–76.View ArticlePubMedGoogle Scholar
- Nelson AM1, Walega DR, McCarthy RJ. The Incidence and Severity of Physical Pain Symptoms in MarfanSyndrome: A Survey of 993 Patients. Clin J Pain. 2015. [Epub ahead of print]Google Scholar
- Tinkle BT, Saal HM, Committee on genetics. Health supervision for children with Marfan syndrome. Pediatrics. 2013;132(4):e1059–72.View ArticlePubMedGoogle Scholar
- Laffargue F, Lienhardt-Roussie A, Lacombe D, Delrue MA. Clinical signs of Marfan syndrome in children under 10 years of age. Arch Pediatr. 2013;20(11):1193–200.View ArticlePubMedGoogle Scholar
- Zadeh N, Bernstein JA, Niemi AK, Dugan S, Kwan A, Liang D, et al. Ectopia lentis as the presenting and primary feature in Marfan syndrome. Am J Med Genet A. 2011;155A(11):2661–8.View ArticlePubMedGoogle Scholar
- De Backer J. Cardiovascular characteristics in Marfan syndrome and their relation to the genotype. Verh K Acad Geneeskd Belg. 2009;71(6):335–71.PubMedGoogle Scholar
- Faivre L, Collod-Beroud G, Adès L, Arbustini E, Child A, Callewaert BL, et al. The new Ghent criteria for Marfan syndrome: what do they change? Clin Genet. 2012;81(5):433–42.View ArticlePubMedGoogle Scholar
- Mueller GC, Stark V, Steiner K, Weil J, von Kodolitsch Y, Mir TS. The Kid-Short Marfan Score (Kid-SMS) - an easy executable risk score for suspected pediatric patients amaranth syndrome. Acta Paediatr. 2013;102(2):e84–9.View ArticlePubMedGoogle Scholar
- Dea JC. Marfan syndrome: clinical diagnosis and management. Eur J Hum Genet. 2007;15(7):724–33.View ArticleGoogle Scholar
- Lacro RV, Dietz HC, Sleeper LA, Yetman AT, Bradley TJ, Colan SD, et al. Atenolol versus losartan in children and young adults with Marfan’s syndrome. N Engl J Med. 2014;371(22):2061–71.PubMed CentralView ArticlePubMedGoogle Scholar
- MacCarrick G, Black JH, Bowdin S, El-Hamamsy I, Frischmeyer-Guerrerio PA, Guerrerio AL, et al. Loeys-Dietz syndrome: a primer for diagnosis and management. Genet Med. 2014;16(8):576–87.PubMed CentralView ArticlePubMedGoogle Scholar
- Loeys BL, Chen J, Neptune ER, Judge DP, Podowski M, Holm T, et al. A syndrome of altered cardiovascular, craniofacial, neurocognitive and skeletal development caused by mutations in TGFBR1 or TGFBR2. Nat Genet. 2005;37:275–81.View ArticlePubMedGoogle Scholar
- Lerner-Ellis JP, Aldubayan SH, Hernandez AL, Kelly MA, Stuenkel AJ, Walsh J, et al. The spectrum of FBN1, TGFβR1, TGFβR2 and ACTA2 variants in 594 individuals with suspected Marfan Syndrome, Loeys-Dietz Syndrome or Thoracic Aortic Aneurysms and Dissections (TAAD). Mol Genet Metab. 2014;112(2):171–6.View ArticlePubMedGoogle Scholar
- Loeys BL, Schwarze U, Holm T, Callewaert BL, Thomas GH, Pannu H, et al. Aneurysm syndromes caused by mutations in the TGF-beta receptor. N Engl J Med. 2006;355:788–98.View ArticlePubMedGoogle Scholar
- Sousa SB, Lambot-Juhan K, Rio M, Baujat G, Topouchian V, Le Merrer M, et al. Expanding the skeletal phenotype of Loeys-Dietz syndrome. Am J Med Genet Part A. 2011;155:1178–83.View ArticleGoogle Scholar
- Mehta P, Holder SE, Fisher B, Vincent TL. A late presentation of Loeys-Dietz syndrome: joint hypermobility is not always benign. Rheumatology. 2014;53(3):574–6.View ArticlePubMedGoogle Scholar
- Sandor GG, Alghamdi MH, Raffin LA, Potts MT, Williams LD, Potts JE, et al. A randomized, double blind pilot study to assess the effects of losartan vs. atenolol on the biophysical properties of the aorta in patients with Marfan and Loeys-Dietz syndromes. Int J Cardiol. 2015;179:470–5.View ArticlePubMedGoogle Scholar
- Stickler GB, Belau PG, Farrell FJ, Jones JD, Pugh DG, Steinberg AG, et al. Hereditary progressive arthro-ophthalmopathy. Mayo Clin Proc. 1965;40:433–55.PubMedGoogle Scholar
- Hoornaert KP, Vereecke I, Dewinter C, Rosenberg T, Beemer FA, Leroy JG, et al. Stickler syndrome caused by COL2A1 mutations: genotype-phenotype correlation in a series of 100 patients. Eur J Hum Genet. 2010;18(8):872–80.PubMed CentralView ArticlePubMedGoogle Scholar
- Richards AJ, McNinch A, Martin H, Oakhill K, Rai H, Waller S, et al. Stickler syndrome and the vitreous phenotype: mutations in COL2A1 and COL11A1. Hum Mutat. 2010;31(6):E1461–71.View ArticlePubMedGoogle Scholar
- Robin NH, Moran RT, Ala-Kokko L. Stickler Syndrome. In: Pagon RA, Adam MP, Ardinger HH, editors. GeneReviews® [Internet]. 2000th ed. Seattle: University of Washington; 2000. p. 1993–2014.Google Scholar
- Acke FR, Malfait F, Vanakker OM, Steyaert W, De Leeneer K, Mortier G, et al. Novel pathogenic COL11A1/COL11A2 variants in Stickler syndrome detected by targeted NGS and exome sequencing. Mol Genet Metab. 2014;113(3):230–5.View ArticlePubMedGoogle Scholar