This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
[{'content': 'Most common site of metastasis in choriocarcinoma \nSelect and explain. \nA. Liver, B. Lung, C. Kidney, D. Spleen', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Lung) (233 - Shaw\'s 14th)CHORIOCARCINOMA - Malignant growths arising in the body of uterus* Most common, metastases are seen in the lungs (80%), brain and liver* Less common sites are GIT, kidney, spleen, genital tract and lymphnodes (10%)* "Cannon ball" metastasis in lung is typical of a malignant lesion* beta - hCG is very specific marker*** Purple haemorrhagic projections either into the lower third of the vagina or around the vaginal orifice is characteristic and pathognomic of chorio carcinoma* The development of chorio carcinoma following H. mole ranges between 2 - 10%* A post molar GTN may be benign or malignant. But a GTN after non-molar pregnancy is always a choriocarcinoma (201 - Dutta 6lh)', 'role': 'assistant'}]