Granulose-theca cell tumor, ovary, camel. (A) Insular pattern with dense fibrous stroma (arrow), HE x 200. (B) Tubule-like (arrow) pattern, HE x 400. (C) Tubule-like pattern expressed strong diffuse positive reaction for vimentin, x 200. (D) Tubule-like pattern expressed moderate focal positive reaction for inhibin, x 200. (E) Sertoli-like pattern, HE x 400. (F) Sertoli-like pattern expressed cytoplasmic positive reaction for melan A, x 200.