The patient was a 9-mondi-old girl who presented with an abdominal mass. Computed tomography scan revealed that the huge heterogeneous mass with cystic, calcified, and solid components occupied the upper abdomen, and diagnosis of tcratoma was made preoperatively. At the operation, a tumor arising from gallbladder and gliomatosis peritonei with intact ovaries were found. This is a rare case report of teratoma that originated in the gallbladder associated with gliornatosis peritonei. (C) 2007 Elsevier Inc. All rights reserved.