When left lobes are lobulated the existence of partly symphysic superior lobe of singular segment the existence of extra horizontal fissure and of the atypical trilobate lobe are significant in clinic and iconography .

左肺 外形分叶中， 完全 和 不全水平裂的存在及 左 肺的不典型 三叶分形在临床及影像学上具有重要意义；