PMC6727461_01
(a) Pre-operative radiograph showing para-articular osteochondroma involving the entire infrapatellar fat pad region and attached to inferior pole of patella with coexisting osteoarthritis. (b) Sagittal and axial computed tomography sections showing mass occupying the whole anterior knee joint cavity.
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F1
Plain radiographs (Fig. 1a) revealed well-defined bony mass just below the patella just posterior to patellar tendon. Computed tomography scan (Fig. 1b) examination revealed well-circumscribed mass with pedicle attached to inferior pole of patella.
(a) Pre-operative clinical picture.(b)Intraoperative picture after arthrotomy showing the entire mass.(c)Excised mass.
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F2
Mass was about 7 cm x 7 cm in size and covered with cartilage (Fig. 2).
Post-operative follow-up radiograph showing removal of entire mass with total knee arthroplasty components in situ.
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F3
Then, total knee replacement done in standard manner(Fig.3).