This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Mrs Neena noted an abdominal mass in it. the side of her 6 mth. old child. Which showed calcification near the left kidney. what will be the cause - \nSelect and explain. \nA. Leukemia, B. Neuroblastoma, C. Renal cell carcinoma, D. Lymphoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Neuroblastoma is the most common solid tumor of infancy and childhood* and 3/4 of pt present with an abdominal mass.\nPlain x-ray shows fine, stippled calcification in 50 percent of the cases.\n\nMore about Neuroblastoma \n\nNeuroblastoma is a malignant tumor of neural crest origin*, arising from the sympathetic nervous tissue from the orbit to the pelvis.\nAge - It occurs chiefly in very young children median age is 2 years.\nIt is the most common solid tumor of infancy and most common tumor in newborn. *\nMC intrabdominal tumor in children.\nM.C. site is-----\xa0Adrenal medulla*\n90% of pts. have increased catecholamine * secretion which can be identified by increased urinary levels of metanephrine and vanillylmandelic acid. Clinical evidence of catecholamine excess is however rare.\nExcessive VIP secretion presents with Hypokalemic watery diarrhoea * syndrome.\nHematogenous metastasis occurs very early. Orbital metastasis* may present with proptosis, periorbital ecchymosis.', 'role': 'assistant'}]