<prompt> Attacks of flushing and cyanosis occur in which type of ovarian tumors?Struma ovariiKrukenbergs tumorArrhenoblastomaCarcinoid tumors of ovary  <response>: Ans. is d, i.e. Carcinoid Tumors of ovaryRef: Shaw 15thed, p378Carcinoid tumor of Ovary: It is sometimes primary and sometimes metastatic. Also called Argentaffinoma. Occurs as a malignant change in benign dermoid cyst. Presence of solid yellow tumor with histological property of reducing silver salts derived from specialized Kulchitsky cells of intestine. It produced 5 - HT which causes attacks of flushing and cyanosis.Q 