This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Choriocarcinoma, Subject name: Gynaecology & Obstetrics
Which of the following is bad prognostic factor for choriocarcinoma? 
Select and explain. 
A. Full term pregnancy, B. Short duration, C. Abortion, D. Low beta HCG
A: Full term pregnancy
Answer: A: Full term pregnancy 
Explanation: ANSWER: (A) Full term pregnancyREF: COGDT 10th ed p. 892, Novak's 14th ed p. 1593PROGNOSTIC FACTORS OF CHORIOCARCINOMAGood prognostic factorsBad prognostic factorsShort duration < 4 monthsSerum beta HCG < 40,000 m IU/ mlNo metastasis to brain or liverNo significant prior to chemotherapyLong duration > 4 monthsSerum beta HCG > 40,000 m IU/ mlMetastasis to liver or liverUnsuccessful prior chemotherapyAfter full term pregnancy