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
Glomus tumor arises from 
Select and explain. 
A. Modified smooth muscle cells, B. Modified skeletal muscle cells, C. Merkel discs, D. Melanocytes
A: Modified smooth muscle cells
Answer: A: Modified smooth muscle cells 
Explanation: 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.