Fig. 1From: A carcinoid tumor arising from a mature cystic teratoma in a 25-year-old patient: a case study a Gross appearance of the left ovary: A multicystic mass containing viscous sebaceous material and hair is visible. b, c Uniform cells are arranged in cords and trabeculae beneath the respiratory epithelium. d, e Tumor cells showing positivity for CD56 and synaptophysin. f The Ki-67 proliferative index in the carcinoid tumor is 1 %Back to article page