Abstract
Intraosseous hibernoma is an uncommon presentation of brown adipose tissue benign tumors. Imaging differential diagnoses include bone island, sclerotic metastasis, lymphoma, hemangioma, and sclerotic myeloma. In this report, a 72-year-old patient presented with right hip pain following a fall injury, leading to an extensive diagnostic workup. Initial CT of the pelvis without contrast suggested potential sclerotic metastatic disease. MRI findings could not be definitive. Further assessment with CT-guided biopsy and S-100 immunohistochemical staining confirmed a rare diagnosis of intraosseous hibernoma. This case describes multimodality imaging characteristics of a rare intraosseous hibernoma with discussion of imaging features of differential diagnostic considerations of related benign and malignant bone lesions.
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