<prompt> Possible causes of choriocarcinoma after hydatidiform mole are all except:Rising hCGMore theca lutein cystsIncreased uterus sizeSuburethral nodule  <response>: Ans. D. Suburethral nodule Choriocarcinoma consists of sheets of anaplastic cytotrophoblast and syncytiotrophoblast cells without chorionic villi. Metastases are always choriocarcinoma. Choriocarcinomas are commonly accompanied by ovarian theca lutein cysts. Choriocarcinoma is seen in postmenopausal women. Pelvic mass is also palpable. hCG level is seen in choriocarcinoma. 