Abstract
IntroductionLipomas 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.Case presentationA 47-year-old male presented with a progressively enlarging, painful mass which approximately 10 cm × 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.ConclusionAlthough 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.
Highlights
Lipomas are the most common benign soft tissue tumors and appear in any part of the body
We report a case of histologically confirmed osteolipoma independent of bone located in the thigh
Conclusion: 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
Summary
Lipomas are the most common benign soft-tissue tumors composed of only mature adipose cells without cellular atypia [1]. We present a rare case osteolipoma independent of bone tissue located in the thigh. Case presentation A 47-year old, Caucasian Turkish man presented with a progressively enlarging, painful mass over his right inguinal region which he first noticed 6 months ago. On physical examination, he had an athletic body habitus and a normal gait. Cut sections of the mass revealed mainly yellow soft tissue with numerous interlacing thin lamellar bony structures and surrounded with a thin fibrous capsule. A haphazardly distributed and interlacing thin vital lamellar bone structures were found throughout the tumour In some areas, these bony structures were alongside the thin fibrous tissue with myxoid degeneration.
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