Primary strumal carcinoid tumor of the ovary: A pregnant patient exhibiting severe constipation and CEA elevation.

► We present a rare case of a PYY-positive primary strumal carcinoid tumor of the ovary during pregnancy. ► MRI was useful for the preoperative diagnosis, and the prenatal course was uneventful after the operation. ► Colitis due to severe constipation caused by PYY, which is an inhibitor of intestinal mobility, might induce serum CEA elevation.

Immunohistochemical analysis of 17β-hydroxysteroid dehydrogenase isozymes in human ovarian surface epithelium and epithelial ovarian carcinoma.

Epidemiological studies have indicated a relationship between gonadal steroid hormones, primarily estrogens, and epithelial ovarian carcinoma. In situ estrogen metabolism and synthesis have been considered to play important roles in the development of the progression of epithelial ovarian carcinoma. 17β-Hydroxysteroid dehydrogenases (17β-HSDs) are a group of intracellular isozymes catalyzing interconversions between estradiol (E2) and estrone (E1).