Immunocytochemical localization of prolactin in carcinoma of the cervix.

Immunocytochemical methods were used to demonstrate prolactin in both normal and malignant human cervices. Four of five cervices with epidermoid carcinoma and three of four cervices with adenocarcinoma demonstrated prolactin. One of four normal cervices stained positive for prolactin in the endocervical glands. Four cervices from pregnant patients were positive for prolactin. The results of this study show prolactin in human cervical carcinomas. The role and source of cervical prolactin is unknown.