Trifurcation of the Left Main Bronchus

Common Congenital Anomalies of the Central Airways in Adults

“…87] The distal hyperinflation is believed to be as a result of collateral ventilation through the pores of Kohn, channels of Lambert, and interbronchiolar channels. [90] [ Figure 6d] It can be found in isolation or accompanying other malformations, namely, congenital cystic adenomatoid malformation, bronchopulmonary sequestration or congenital lobar emphysema. [ Figure 6c] However, the latter without characteristic CT imaging findings may be a normal anatomic variation rather than an atretic bronchus.…”

An Unusual Bronchoscopic Finding

“…In the LUL, the principal variation is an accessory anterior bronchus with associated downward displacement of an anterior segmental bronchus [1] . In 2000, Doshi and Mehta [2] first reported a trifurcate left main bronchus, which gave rise to the upper lobe, lingular and left lower lobe bronchi. To our knowledge, there has been no report of a five-orifice LUL bronchus in the literature.…”