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Table 1 Distribution of prevalent cysts and bursitides according to baseline Kellgren-Lawrence grades of radiographic osteoarthritis

From: Longitudinal assessment of cyst-like lesions of the knee and their relation to radiographic osteoarthritis and MRI-detected effusion and synovitis in patients with knee pain

Type of lesiona Kellgren-Lawrence grade
  All (N= 319) 0 (N= 103) 1 (N= 27) 2 (N= 37) 3 (N= 136) 4 (N= 16)
Any type* 208 (65) 56 (54) 19 (70) 29 (78) 90 (66) 14 (88)
Popliteal cyst 128 (40) 31 (30) 16 (59) 15 (41) 56 (41) 10 (63)
Subgastrocnemius bursitis 49 (15) 8 (8) 5 (19) 10 (27) 23 (17) 3 (19)
proximal tibiofemoral joint cyst 26 (8) 10 (10) 1 (4) 5 (14) 9 (7) 1 (6)
Hoffa's fat pad ganglion cyst 25 (8) 6 (6) 2 (7) 7 (19) 9 (7) 1 (6)
SM-MCL bursitis 13 (4) 1 (1) 0 (0) 1 (3) 7 (5) 4 (25)
PCL ganglion cyst 11 (3) 2 (2) 0 (0) 4 (11) 4 (3) 1 (6)
ACL ganglion cyst 9 (3) 3 (3) 0 (4) 2 (5) 4 (3) 0 (0)
Medial meniscal cyst 8 (3) 3 (3) 1 (4) 0 (0) 4 (3) 0 (0)
MCL bursitis 8 (3) 1 (1) 0 (0) 0 (0) 5 (4) 2 (13)
Prepatellar bursitis 6 (2) 0 (0) 0 (0) 0 (0) 5 (4) 1 (6)
Anserine bursitis 4 (1) 0 (0) 1 (4) 1 (3) 2 (2) 0 (0)
Iliotibial bursitis 3 (1) 0 (0) 1 (4) 0 (0) 0 (0) 2 (13)
Superficial infrapatellar bursitis 3 (1) 1 (1) 0 (0) 0 (0) 2 (2) 0 (0)
Deep infrapatellar bursitis 2 (1) 0 (0) 0 (0) 0 (0) 1 (1) 1 (6)
Lateral meniscal cyst 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
  1. Data presented as number of lesions, either grand total or subtotal for each type of cystic lesions (percentage of knees that had a cystic lesion out of total 319 knees surveyed). N, number of knees that belong to each Kellgren-Lawrence grade; SM-MCL, semi-membranosus medial collateral ligament; PCL, posterior cruciate ligament; ACL, anterior cruciate ligament; MCL, medial collateral ligament. aIn order of descending frequency at baseline. *Statistically significant increasing prevalence with increasing Kellgren-Lawrence grade (P = 0.014, by logistic regression controlling for clustering by person).