An Unusual Presentation of a Left Extra-acetabular Trochanteric Bursa Abscess.

Trochanteric bursitis is a common cause of lateral hip pain, particularly among elderly and postmenopausal females, but abscess formation within the trochanteric bursa is exceedingly rare. We report an unusual extra-acetabular trochanteric abscess identified during cadaveric dissection of an elderly female, characterized by irregular fibrotic and proteinaceous tissue with multiple inclusion bodies but no evidence of malignancy or granulomatous inflammation. Although limited by an absent clinical history, the gross and histopathologic findings suggest a chronic inflammatory or degenerative process consistent with synovial osteochondromatosis of the trochanteric bursa.