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Variations in the tracheobronchial tree are commonly identifi ed during bronchoscopy. Several studies have showed that bronchial ramifi cation is a process programmed and genetically controlled; any disruption in the intrauterine development can generate a wide spectrum of bronchial variations. According with the best evidence available, bronchial modifi cations are different in type and frequency among geo- graphic areas, races and between members of the same ethnicity. There is scarce information about the topic in our country; based on this context, the main purpose is to communicate the frequencies of bronchial variations in a group of patients who were referred to a bronchoscopic study in the southeast of Mexico. The authors consider that the fi ndings enhance the discussion related with genetics in bronchial variations.

Variaciones anatómicas del árbol traqueobronquial en dos hospitales de referencia de Yucatán, México