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Table 1 Studies included, study size, Knee Society Score (KSS), range of movement (ROM), stiffness, recurrence and quality assessment

From: Systematic review: total knee arthroplasty (TKA) in patients with pigmented villonodular synovitis (PVNS)

Author Year of study Study size KSS (functional) KSS (clinical) ROM pre-op ROM post-op Mean ROM
(pre-op)
Mean ROM (post-op) Stiffness Recurrence Quality assessmenta
Houdek et al. [13] 2017 48 TKAs
D-PVNS: 40
L-PVNS: 8
45 to 62 54 to 87 30–35o 60–130o 99o 101o 13 knees 6 knees ++
Su et al. [15] 2019 28 TKAs
D-PVNS: 28
L-PVNS: 0
48.9 to 84.6 38.9 to 84.4 60–100o 90–130o 86.1o 107o 0 knees 0 knees ++
Verspoor et al. [16] 2016 12 TKAs
D-PVNS: 8
L-PVNS: 4
70.45
(post-op only)
77.6
(post-op only)
NR NR NR NR 1 knee 1 knee ++
Lei et al. [14] 2016 11 TKAs
D-PVNS: 8
L-PVNS: 3
35.0 to 81.8 40.5 to 90 60–100o 95–120o 80.5o 109.5o 0 knees 0 knee ++
Casp et al. [12] 2018 453 TKAs NR NR NR NR NR NR 31 knees NR ++
   Total:
99 TKAs (552 TKAs including Casp et al.)
D-PVNS: 84
L-PVNS: 15
74.71 84.75    92.51o 104.01o 45 knees 7 knees  
  1. aQuality assessment of included articles (percentage of Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist met, < 50% = −, 50–80% = +, > 80% = ++). The STROBE checklist is available at https://www.strobe-statement.org/index.php?id=available-checklists
  2. TKA total knee replacement, D-PVNS diffuse pigmented villonodular synovitis, KSS Knee Society Score, L-PVNS localized pigmented villonodular synovitis, NR not reported, pre-op pre-operative, post-op post-operative, ROM range of motion