The role of Tc-99m RBC scintigraphy in the differential diagnosis of orbital cavernous hemangioma

The cavernous hemangioma is the most common benign orbital tumor in adults. Its presentation is during the forth to fifth decades with a slowly progre ssive unilateral proptosis. Intraconal cavernous hemangiomas may be difficu lt to differentiate from other intraconal lesions such as schwannomas, meni ngiomas and hemangiopericytomas. We report a case of orbital cavernous hema ngioma diagnosed by Tc-99m RBC scintigraphy. Tc-99m RBC scintigraphy reveal ed a typical scintigraphic pattern in which there is intense focally increa sed uptake on the delayed image. We conclude that Tc-99m RBC scintigraphy c an be a useful method in the differential diagnosis of orbital cavernous he mangioma as in hepatic hemangioma.