Abstract
A 28-year-old woman presented with a mass in her right leg, which, on plain radiograph, appeared as a lytic lesion in the mid-shaft of the tibia with cortical thinning but without periosteal reaction. Tc-MDP 3-phase bone scan demonstrated intense uptake in the periphery of the mass with a photopenic center, the so-called doughnut sign. Histopathology revealed a capillary hemangioma. This case demonstrates that the doughnut sign on bone scan can be caused by capillary hemangioma in addition to other reported bone pathologies, including aneurysmal bone cyst, giant cell tumor, and telangiectatic osteosarcoma.
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