Fibular Head Bursa

bursa subcutanea capitis fibulae

The fibular head bursa is a small subcutaneous bursa overlying the head of the fibula at the lateral aspect of the proximal leg. It develops in response to direct pressure, particularly in individuals who sit with legs crossed habitually or who sustain direct blows to the fibular head. It is closely related anatomically to the common peroneal nerve as it winds around the fibular neck.

Region: Knee

Clinical Relevance

Clinical Notes

Fibular head bursitis must be distinguished from common peroneal nerve entrapment, as both present with lateral knee and proximal leg symptoms. A palpable fluctuant mass over the fibular head, absent neurological signs, and improvement with aspiration confirm bursitis rather than nerve compression. Biceps femoris tendinopathy and proximal tibiofibular joint pathology are other differential diagnoses in this region.

Pathology

Common Injuries & Conditions

Fibular Head Bursitis

Subcutaneous swelling and tenderness directly over the fibular head, aggravated by pressure during sitting, treated with padding, aspiration, and corticosteroid injection; surgical excision is rarely needed.