A case of giant lateral sinus pericranii, which presented in a patient
during early childhood as a soft, collapsible mass and gradually grew
until it reached 13 x 9 cm when the patient was 36 years of age, is r
eported. The patient underwent successful surgery and the lesion was t
otally excised. The results of diagnostic tests (computerized tomograp
hy scanning, magnetic resonance imaging, cerebral angiography, and sin
usography) and surgery-related problems are presented and discussed.