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Accessory Left Lung Fissure with Rare Branching Pattern of Bronchial Tree

Pulmonary fissures separate bronchopulmonary segments and delineate lungs into lobes Anatomical variation of these fissures lie on a continuum from completely fused lobes to accessory fissures in about 17.5% of right and 2% of left lungs. Hilar variations in the bronchial tree and vasculature can also be seen in lobar abnormalities.