Parosteal lipoma.

CASE REPORT A 49 year-old female presented with a mass the size of a large grapefruit in the right gleno-humeral region. She described a constant ache from the lesion which had been present for about three months. There was some limitation of movement at the shoulder joint. There was no evidence of inflammation or lymphadenopathy. X-ray showed a large low density soft tissue mass in keeping with a lipomatous lesion. There was also a central focus of ossification with an unusual branching pattern resembling a candelabrum, which arose from the humeral cortex (Fig. 1). Spiral tomography confirmed the presence of a well defined fatty lesion containing an area of ossification and also showed that this mass abutted the lateral aspect of the uppermost part of the humeral diaphysis (Fig. 2). At excision biopsy it was thought the mass was an osteochondroma with an overlying lipoma.