title: Osteolipoma independent of bone tissue: a case report.
abstract: BACKGROUND
  Lipomas are the most common benign soft tissue tumors and appear in any part of the body. They typically consist of mature adipose tissue. Osteolipoma is an extremely rare histologic variant of lipoma that contains mature lamellar bone within the tumor and osteolipoma independent of bone tissue are very rare. We report a case of histologically confirmed osteolipoma independent of bone located in the thigh.
  
  
  METHODS
  A 47-year-old male presented with a progressively enlarging, painful mass which approximately 10 cm x 8 cm over the anteromedial aspect of his right thigh. Plain films, Computerized Tomography, Magnetic Resonance Imaging and ultrasound guided needle biopsy were performed. Given the benign imaging characteristics and fine needle aspiration, an excisional biopsy was undertaken. The definitive pathologic diagnosis was intramuscular osteolipoma without evidence of malignancy. No recurrence was observed after 18 months follow up.
  
  
  CONCLUSIONS
  Although ossifying lipomas are very rare, it is important to keep them in mind when a lesion with adipose tissue in combination with ossification is encountered.
authors.affiliation: Department of Orthopaedics and Traumatology, Gulhane Military Medical Academy 06018 Etlik, Ankara Turkey. bahtidemiralp@yahoo.com
authors.forename: Bahtiyar
authors.initials: B
authors.lastname: Demiralp
authors.forename: Joseph F
authors.initials: JF
authors.lastname: Alderete
authors.forename: Ozkan
authors.initials: O
authors.lastname: Kose
authors.forename: Ayhan
authors.initials: A
authors.lastname: Ozcan
authors.forename: Ilker
authors.initials: I
authors.lastname: Cicek
authors.forename: Mustafa
authors.initials: M
authors.lastname: Basbozkurt