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Venous thrombosis in infants and children.

Venous thrombosis presents with a wide spectrum of clinical manifestations, including seizures, subarachnoid hemorrhage, acute neurologic deficit, pseudotumor cerebri, and cerebrovascular accidents. Eight cases are presented; only three patients had predisposing illnesses. Radiographic venous abnormalities include an occluded sinus; visualization of enlarged or prominent collateral venous pathways; delayed venous emptying, both regional and general; reversal of normal venous flow; and abnormal cortical veins. Diagnosis can be made by analysis of the venous phase of the cerebral angiogram, particularly with use of subtraction techniques. Jugular venography is sometimes necessary.