This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney and ureter, Subject name: Surgery
[{'content': 'A 4 years old child was brought to the hospital with complains of abdominal mass and fever. On CT, crescent shaped, discrete & peripheral calcification was seen. Which of the following chemotherapy regimen is given in this condition? \nSelect and explain. \nA. FOLFOX, B. ECF, C. CAF, D. VCD', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hints in the question suggesting diagnosis of Wilms tumor - Age - Abdominal mass - Crescent shaped, discrete and peripheral calcification Chemotherapy regimen used in Wilms tumor- Vincristine, Cyclophosphamide, Doxorubicin/Dactinomycin CA esophagus & CA stomach ECF (Epirubicin + Cisplatin + 5-FU) Colorectal carcinoma FOLFOX-IV Folinic add /Leucovorin + 5-FU) CA Breast CAF (Cyclophosphamide + Adriamycin + 5-FU) Staging Pre-chemotherapy staging Post-chemotherapy staging - Preferred by National Wilms Tumor Staging System (NWTS system) - Staging & surgery is done beforechemotherapy - Preferred by International society ofPediatric Oncology (SIOP staging system)- Staging & Surgery is done afterchemotherapy', 'role': 'assistant'}]