Standardized reporting and quantification of whole-body MRI findings in children with chronic non-bacterial osteomyelitis treated with pamidronate

Table 1 The original and the modified radiologic index for standardized reporting of whole-body MRI in patients with chronic non-bacterial osteomyelitis

Parameter of interest	Criterion RINBO	Criterion mRINBO	Value
No of patient’s radiological active lesions
Unifocal	1	1	1
Paucifocal	2–4	2–4	2
Multifocal	≥ 5	≥ 5	3
Maximum size of patients’ radiological active lesion
Minor	< 10 mm	< 20 mm	1
Average	10–100 mm	20–50 mm	2
Major	> 100 mm	> 50 mm	3
Extramedullary affection
Acute	Periostal reaction and/or soft tissue edema	Periostal reaction and/or soft tissue edema	1
Chronic	Hyperostosis	Hyperostosis	1
Spinal involvement
Acute	Radiologically active vertebral lesion	Radiologically active vertebral lesion	1
Chronic	CNO related vertebral body deformation	CNO related vertebral body deformation	1
Maximum index point			10

RINBO Radiologic index for chronic non-bacterial osteomyelitis (21), mRINBO Modified RINBO score with new definitions of the maximum size of patients’ radiological active lesion
based on the current sizes and exclusion of radiological active lesions in the metatarsal bones

ISSN: 1546-0096