This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: E.N.T., Subject name: Surgery
[{'content': 'Glomus tumor arises from \nSelect and explain. \nA. Modified smooth muscle cells, B. Modified skeletal muscle cells, C. Merkel discs, D. Melanocytes', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Modified smooth muscle cells Glomus tumors (Glomangioma)* Glomus tumors are benign but exquisitely painful tumors arising from modified smooth muscle cells of the glomus bodies, arteriovenous structures involved in thermoregulation.* Although they may superficially resemble hemangiomas, glomangiomas arise from smooth muscle cells rather than endothelial cells.* They are most commonly found in the distal portion of the digits, especially under the fingernails.* Excision is curative.", 'role': 'assistant'}]