This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Anatomy
[{'content': 'A parent 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. Neuroblastoma, B. Leukemia, C. Renal cell carcinoma, D. Lymphoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Neuroblastoma is the most common solid tumor of infancy and childhood* and 3/4 of pt present with an abdominal mass. Plain x-ray shows fine, stippled calcification in 50 percent of the cases. More about Neuroblastoma Neuroblastoma is a malignant tumor of neural crest origin*, arising from the sympathetic nervous tissue from the orbit to the pelvis. Age - It occurs chiefly in very young children median age is 2 years. It is the most common solid tumor of infancy and most common tumor in newborn. * MC intrabdominal tumor in children. M.C. site is----- Adrenal medulla* 90% 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. Excessive VIP secretion presents with Hypokalemic watery diarrhoea * syndrome. Hematogenous metastasis occurs very early. Orbital metastasis* may present with proptosis, periorbital ecchymosis. Ref : Bailey & Love 25/e p814', 'role': 'assistant'}]