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[Association of subdural hematoma and middle fossa arachnoid cyst: report of 3 cases and a review].

Three cases of arachnoid cyst of the middle fossa associated with subdural hematoma were briefly reported. In all three cases diagnosis was confirmed by CT scan and operation. A review of the literature found reports of 21 similar cases with adequate descriptions of clinical and radiological data for analysis. Of a total of 24 such cases including our 3 patients (Group B in Table 2), 21 were male and only 3 were female. The arachnoid cyst was found on the left side in 18, on the right side in 5 and bilaterally in the remaining one. Thirteen patients were in age 11 through 20. When compared Group B with Group A comprising 153 cases of arachnoid cyst of the middle fossa irrespective of presence or absence of associated subdural hematoma, such an association was seen most frequently in the male teenagers, probably reflecting the higher incidence of head injuries.