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Intracerebral cavernous angiomas

Departments of Neurosurgery, Neuropathology, and Neuroradiology, Montreal Neurological Hospital and McGill University, Montreal, Quebec, Canada.

We studied 31 patients with histologically verified intracerebral cavernous angiomas. Twenty-two patients were symptomatic; nine were asymptomatic. All 22 symptomatic patients had seizures, three had intracranial hemorrhage, and one had signs of a space-occupying lesion. Twenty-seven lesions were located in the neocortex, three in the brainstem, and one in the cerebellum; all exhibited characteristic gross and microscopic features of cavernous angiomas. CT identified the location and extent of the lesion in 16 of 27 cases. Six of seven lesions demonstrated contrast enhancement, and ten of 27 scans harbored densities consistent with intracerebral calcium. Angiography was performed in 17 cases and was completely normal in eight. MRI revealed mixed signal intensity centrally with a ring of decreased signal intensity peripherally on T₂-weighted images and was diagnostic in five cases. Surgical treatment offers an excellent prognosis for seizure control in patients with such lesions.

Address correspondence and reprint requests to Dr. Villemure, Montreal Neurological Hospital, 3801 University St., Montreal, QC H3A 2B4, Canada.

Received February 16, 1988. Accepted for publication in final form May 3, 1988.

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