1. Fat-containing osseous lesions are generally benign and nonaggressive.2. Identifying intralesional fat using CT or MRI can aid in accurate diagnosis and ensure appropriate management, often preventing unnecessary biopsies.3. This presentation will provide a review of common fat-containing osseous lesions and discuss their clinical presentation, imaging appearance, and management recommendations.

Background Accurate assessment of osseous lesions on imaging can be challenging. Intralesional fat is highly suggestive of a benign process and seen in only a few tumor types and some non-neoplastic conditions. Identifying fat within a lesion, which can be confidently performed with CT or MRI, is therefore an important step in the evaluation of all osseous lesions. This presentation will provide a case-based review of fat-containing osseous lesions including their typical clinical presentation, imaging appearance, and management options for each lesion.Case Based Reviewa. Intraosseous lipomab. Parosteal lipomac. Intraosseous hemangiomad. Bone infarct e. Focal red marrowf. Paget diseaseg. Fibrous dysplasiah. Intraosseous dermoid cysti. Intraosseous hibernomaj. Involuting simple bone cystk. Treated bone metastasis