Abstract
The clinical and radiographic features of extra-axial cavernous hemangiomas are described, and a case of homonymous visual field loss due to a dural-based occipital cavernous hemangioma is reported. A patient presented with a homonymous hemianopsia due to an enhancing tentorial mass lesion. The preoperative clinical and magnetic resonance imaging features were suggestive of meningioma. The patient underwent gross total resection of the lesion and the final pathologic examination was consistent with cavernous hemangioma. There was complete resolution of the visual field defect after surgery. Extra-axial cavernous hemangiomas differ from intra-axial cavernous hemangiomas in their clinical and radiographic features. The former lesions may mimic meningioma and should be considered in the differential diagnosis of a dural-based mass. Early recognition of the lesion is important because surgical removal of cavernous hemangiomas may be associated with a higher morbidity and mortality rate than meningiomas.
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