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September 1987

Vascular Malformations of the Posterior Fossa: Clinical and Radiologic Features

Author Affiliations

From the Departments of Neurology (Drs Silber and Sandok) and Diagnostic Radiology (Dr Earnest), Mayo Clinic and Mayo Foundation, Rochester, Minn.

Arch Neurol. 1987;44(9):965-969. doi:10.1001/archneur.1987.00520210059020

• Thirty-one patients with vascular malformations of the posterior fossa were studied to determine their clinical presentation and radiologic diagnosis. The most common clinical presentations were acute hemorrhage (68%, 21/31) and progressive or fluctuating focal neurologic deficits resembling those found in other pathologic processes (19%, 6/31). Trigeminal neuralgia and hemifacial spasm occurred in these patients, but they were rarely initial presenting symptoms. Computed tomography, after infusion of contrast medium, was abnormal in 95% (20/ 21) of the patients. Angiography established or confirmed the diagnosis in most of the patients; however, a negative angiogram, especially in cases with recent hemorrhage, does not exclude the diagnosis.

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