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Table 1 Clinical presentations reported in literatures

From: Pigmented villonodular synovitis in pediatric population: review of literature and a case report

Clinical presentation Number of patients Age (years) Sex Treatment (OSa/ASb) Follow up Recurrence Authors
Knee pain and swelling 21 1–15 (mean 9.1) 10 Mc, 11 Fd 12 OS, 7 AS, 1 OS + AS, 1 injection 5 month-2 years None Baroni [3], Neubauer [12], Bruns [11], Jawadi [5], Deepak [14], Hong [6], Saulsburg [7], Jha [9], Maric [15], Nizam [13]
Painless swelling of knee 1 5 1 M AS 2 years None Van Emelen [10]
Politeal cyst 1 12 1 M OS + AS Meehan [8]
Foot and ankle pain and swelling 4 3–14 (mean 10.3) 3 M 1 F OS 6 month-2 years None Neubauer [12], Aghasi [24], Freedman [23], Kaneko [26]
Painless mass of foot and ankle 3 11–12 (mean 11.7) 1 M
2 F
OS 1–4 years None Zambakides [25], Sofier [21], Duncan [22]
Elbow 1 8 1 F AS Hsiu Su [19]
Non tender mass or swelling of elbow 2 6 (mean 6) 2 F OS 2 years None Sekiya [18], Aydingoz [17]
Multifocal involvement 6 4.5–7 (mean 5.8) 1 M
5 F
OS 6 month-25 years 3 cases Mukhopadhyay [28], Tavangar [27], Vedantam [29], Zhao [30], Walls [32], Leszczynski [31]
Hip pain 1 7 1 F AS + OS Not reported Higuchi [20]
Sacral joint involvement 1 12 1 F OS Kang [20]
Hand swelling 1 7 1 F OS 7 year 1 case Neubauer [12]
Average 3.8 8.9 F/M: 1.6/1 OS 69%, AS 21.5%, OS + AS 7%, Injection 2.5 4.9 years 9.5%  
  1. aOpen synovectomy
  2. bArthroscopic synovectomy
  3. cMale
  4. dFemale