An accidental gallbladder schwannoma misdiagnosis as malignant cancer.

To the Editor: Schwannomas are mainly benign neurogenic tumors originat- ing from the Schwann cells in peripheral nerves sheaths and oc- cur in patients at any age and in every location [ 1 , 2 ]. The most common occurring sites of schwannomas are the head, neck and extremities [3] . In the abdominal cavity, the most frequently in- volved sites are the retroperitoneum and stomach [4] . Schwanno- mas in the gallbladder are uncommon and rarely have been re- ported in the literature. Due to the lack of specific clinical experi- ence, schwannomas in the gallbladder are almost indistinguishable from malignant tumors and hard to make an accurate preopera- tive diagnosis. We herein report a case of gallbladder schwannoma, which was misdiagnosed as cancer before operation.