Superior Tibiofibular Bursa

bursa articulationis tibiofibularis superioris

A small bursa may develop adjacent to the proximal tibiofibular joint, between the fibular head and the surrounding soft tissues including the lateral collateral ligament, the popliteofibular ligament, and the biceps femoris tendon. When the proximal tibiofibular joint is disrupted or arthritic, this bursa becomes distended with joint fluid that tracks into the periarticular tissues.

Region: Knee

Clinical Relevance

Clinical Notes

The superior tibiofibular bursa is relevant in proximal tibiofibular joint instability and arthritis, which produce posterolateral knee pain and a palpable mass at the fibular head. It may also communicate with the common peroneal nerve intraneural ganglion that tracks from the superior tibiofibular joint into the nerve trunk — a well-recognised cause of peroneal palsy. Aspiration of the bursa under ultrasound guidance provides diagnostic confirmation and temporary relief; surgical treatment addresses the underlying joint instability or ganglion-nerve communication.

Pathology

Common Injuries & Conditions

Superior Tibiofibular Bursal Cyst Compressing Peroneal Nerve

A ganglion cyst arising from the superior tibiofibular joint may track into the common peroneal nerve intraneural space via its articular branch, compressing the nerve and producing progressive foot drop; MRI demonstrates the cyst arising from the joint and tracking along the peroneal nerve, with surgical joint decompression and nerve decompression required to prevent permanent denervation.