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Four patients with splenic masses were operated upon and found to have epidermoid cysts of the spleen, a rare lesion comprising less than 10% of benign, nonparasitic splenic cysts. The patients were young and had vague, non-specific symptoms which were related to the size of the slowly enlarging splenic mass. Three patients had palpable masses. Contrast gastrointestinal studies and intravenous urography will help exclude mass lesions of the gastrointestinal or genitourinary tract. Sonar scan may confirm the cystic nature of the lesion and localize it to the spleen. A review of 42,327 autopsy records at the Los Angeles County--University of Southern California Medical Center revealed 32 benign splenic cysts found incidentally at autopsy. Hemorrhage, infection, rupture, and rarely, malignant change are complications of splenic cysts. Splenectomy is recommended to eliminate the symptoms produced by the cyst and prevent the potential complications.

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