This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neoplasia, Subject name: Pathology
[{'content': 'Which of the following condition is associated with increased VMA? \nSelect and explain. \nA. Rhabdomyosarcoma, B. Pheochromocytoma, C. Nephroblastoma, D. RCC', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Pheochromocytoma * Vanillylmandelic acid (VMA) is an end-stage metabolite of the catecholamines, epinephrine, and norepinephrine.* Urinary VMA, along with other catecholamine metabolites, including homovanillic acid (HVA), metanephrine, and normetanephrine are elevated in patients with tumors that secrete catecholamines (eg, neuroblastoma, pheochromocytoma, or other neural crest tumors).* These tests are used to diagnose neuroblastomas, and to monitor treatment of these conditions.* Elevated values of homovanillic acid (HVA), vanillylmandelic acid (VMA), and other catecholamine metabolites (eg, dopamine) may be suggestive of the presence of a catecholamine-secreting tumor.", 'role': 'assistant'}]