An unusual location of osteolipoma: a case report

Lipomas are the most common benign tumors of soft tissue in adults [1]. They may be located in either deep or surface tissues. Deep tissue-located lipomas are classified as intramuscular, intermuscular, parosteal, and interosseous lipomas [1]. It is common to encounter intraosseous lipomas originating from bony tissues, whereas it is very rare to encounter adipocytic cells with osteoid and/or chondroid tissues independent of bony tissues [2]. Osteoid lipomas (benign osteoid lipoma, osteolipoma, degenerative osteolipoma) are lipomas containing mature osteoid tissues [3, 4]. Osteoid lipomas are reported to be less than 1 % in the literature [2]. Osteolipomas, which found independent of bony tissue, are rare kind of tumors [5]. In our study, we intend to report a rare case of osteolipoma with a rare location independent of bony tissue and to emphasize that this lesion should be included in differential diagnosis of lipomatous lesions present in extremities.