A lump in the groin: an unusual presentation of loose hip prosthesis

We describe the loose hip prosthesis presenting as a mass in the groin, with a collection of titanium and polyethylene debris within the ileopsoas bursa. Titanium tissue staining has been noted, at the time of revision of titanium prostheses, but frank ileopsoas bursitis presenting as a groin mass, after hip replacement has not previously been described.