“…5 However, for our 2 cases of primary ovarian carcinoid tumor, which is categorized as a neoplasm with low-grade malignant potential, the low signal intensity on T 2 -weighted images mimicked that of benignˆbrous tumors. [1][2][3] Ovarian carcinoid tumors are divided into 4 subtypes, insular (islet), trabecular, mucinous (goblet cell), and strumal carcinoids, 2-4 each characterized byˆbromatous stroma from serotonin produced by the tumor that separates nests of tumor cells. Frequently, the stroma is dense and hyalinized, as in Brenner tumors or adenoˆbromas.…”