A Rare Subtype in an Uncommon Location: Multimodal Radiologic and Histopathologic Evaluation of a Solid Variant Aneurysmal Bone Cyst in the Radial Head.

A 30-year-old male presented with pain and swelling in the left elbow. Multimodal radiologic evaluation revealed an expansile, lytic bone lesion with fluid-fluid levels and surrounding soft tissue edema, localized in the radial head. Histological examination confirmed the diagnosis of a solid variant of aneurysmal bone cyst (SVABC), an anatomically rare site for such lesions. The lesion was managed with curettage, leading to complete clinical resolution. Teaching point: integrating radiologic and histologic findings to an accurate diagnosis and effective management of SVABC, especially when occurring in atypical locations where they may mimic more aggressive neoplasms.