Carcinoid Tumor Arising in a Mature Cystic Teratoma

Mature cystic teratomas (dermoid cyst) make up almost 20 % of all ovarian neoplasms. Although they are almost always benign tumors, the rare development of cancer deserves emphasis. The most common malignant change in a dermoid cyst is squamous cell carcinoma, followed by adenocarcinoma and carcinoid tumor (1-3). Primary of ovarian carcinoid tumors are uncommon and the majority of them are associated with mature cystic teratomas (4). Robboy et al (5) divided these tumors into three types: the insular type, trabecular type, and strumal carcinoid type. We report herein a case of insular carcinoid tumor arising from a mature cystic teratoma, which was examined by histological and immunohistochemical methods. Case report A 52 year old Turkish woman was admitted to İbn-i Sina Hospital because of an abdominal mass which she had noticed years ago. Physical examination revealed a palpable mass in the