Symptomatic enlarged fabella

Description

A male patient aged 20 years presented to our outpatient department reporting of a 2-year history of right knee discomfort associated with snapping episodes, especially when moving from a seated to a standing position. His medical history was unremarkable and there was no history of trauma. The oblique radiograph of the knee revealed a large ossified structure at the posterolateral corner (figure 1). Routine blood tests, erythrocyte sedimentation rate and C reactive protein were within normal limits. MRI of the knee showed the large ossified structure within the lateral head of the gastrocnemius, while the rest of the examination was normal (figure 2). The tendon of the lateral head of the gastrocnemius attached to its posterior aspect and the anterior surface articulated with the lateral femoral condyle. Based on the location and anatomical characteristics, the structure was identified as a fabella and its large...

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