Immunohistochemical stain of pan-CK, vimentin and inhibin A in rat ovarian tumor. Pan-CK was expressed in (A) serous adenocarcinoma, (B) clear cell adenocarcinoma(C) endometroid adenocarcinoma, and (N) normal ovarian surface epithelium but not in (D) sarcoma. (200×). Vimentin was expressed in the stroma of (E) serous adenocarcinoma, (F) clear cell adenocarcinoma and (G) endometroid adenocarcinoma, but in (H) sarcoma cancer cell. (200×). Inhibin A was strongly expressed in (I) serous adenocarcinoma, (J) clear cell adenocarcinoma, (K) endometroid adenocarcinoma, and (M) granulosa cell of normal rat ovarian tissue, but weakly in (L) sarcoma. (200×).