Humeral Intra-Osseous Lipoma with Hemorrhage-A Case Report

INTRODUCTION The intraosseous lipoma is the most common lipogenous lesion of bone. Intraosseous lipoma is found most frequently in the calcaneus and intertrochanteric region of the proximal femur. The symptoms may result from remodeling of bone due to expansion, or due to intralesional ischemia, noted to be a common consequence of a longstanding calcaneal intraosseous lipoma [1-4]. Intraosseous lipoma is an uncommon benign bone tumor which, as it slowly expands and remodels adjacent osseous structures, acquires a typical appearance that should be readily diagnostic on plain radiographs and MRI. Intraosseous lipomas may present with bone pain up to 66% of the time from chronic expansion, or with acute symptoms related to pathologic (insufficiency) fracture [1,3]. Although there exists a differential diagnosis, including bone infarct, unicameral bone cyst, aneursymal bone cyst, chondromyxoid fibroma, osteoblastoma and giant cell tumor, the presence of patently obvious fat signal intensity on T1-weighted MR images should allow a near 100% sensitivity and specificity in the diagnosis of calcaneal intraosseous lipoma [1,4]. CASE REPORT