PMC4719233_01
Fig 1a-Plain X-ray of left knee joint showing the radiodence body in front of femoral condyles with irregularity of posterior margin of medial condyle. Fig 1b- MRI T-2 image showing the effusion, synovial hypertrophy and a loose calcific body in front of the femoral condyle pushing over the patellar tendon anteriorly.
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F1
Plain X-ray of the left knee joint shows a large radiodense body in front of the femoral condyle with irregularity of the posterior articular margin of the medial condyle (Fig. 1a).
Fig2a Left knee joint exposed by medial parapatellar approach, a large loose body lying in front of lateral condyle and intercondylar notch. Fig2b Irregular nodular mass seen over the anterior and marginal portion of the medial condyle. Fig2c Another irregular mass attached to synovial-cartilage junction of medial condyle and the adjacent cartilage. Fig2d A large loose body of around 7x4cm extracted from the knee joint.
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F2
A large loose body of around 7x4 cm was removed which was lying beneath the patellar tendon and lateral ratinaculum (Fig. 2a,2d). Irregular nodular outgrowths were present along the margins of medial femoral condyle from anterior to posterior, which were thoroughly removed (Fig.2b,2c).
Fig3a Histopathology slide of the loose body showing lobules of cartilage without cellular atypia. Fig3b Histopathology of synovium showing the papillary hypertrophy of synovium with increased vascularity.
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F3
Synovium and the bodies were sent for histo-pathological examination, which confirmed the diagnosis of synovial chondromatosis with papillary hyperplasia of the synovium (Fig.3a,3b).