Fig. 5
From: Ovarian mature cystic teratoma with fistula formation into the rectum: a case report
Histopathological images. a A histological section of the mature cystic teratoma reveals abundant inflammatory cell invasion (circled section) and hair-shaft tissue (arrows). b A section of the rectal-fistula site shows hair-shaft tissue in the serous membrane of the rectum (arrow)