True about carotid body tumor-
Correct Answer: Commonly seen in high altitude habitants
Description: Ans is 'c' i.e. Commonly seen in high altitude habitants Carotid body tumors arise from chemoreceptor cells of the carotid body (Baroreceptor cells are found in carotid sinus) Since the chemoreceptor cells are stimulated by decreased aerial oxygen tension, a higher incidence of carotid body tumors is noted in oxygen deprived individuals i.e. cyanotic hea ds, chronic hypoxia in high altitude inhabitants. According to Bailey 25/e p732- Family history is seen in -10% patients. (According to Schwaz its 35%) FNAC & biopsy are contraindicated because of the highly vascular nature of the tumor.
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