Proximal interruption of the right or left pulmonary artery is a rare anomaly, which may be accompanied by cardiovascular anomalies. 从右侧或左侧肺动脉近端中断是罕见的先天异常，而且可能会合并其他的心血管异常。
On the sections of 27 cadavers (61.4%), left pulmonary artery and anterior segmental artery which together like a fishhook drew left superior pulmonary vein. 在27例(61.
In 18 cases with cancer of 8cm and bigger in diameter,4 lymph node involvement (22%)around left pulmonary vein, 18 nodal involvement( 100%) at left gastric artery, 16(88%)at trachea carina and 1 at left pulmonary artery were found. 8cm以上病例18例
UAPA diagnosed in childhood usually has unilateral absence of the left pulmonary artery and associated congenital cardiovascular anomaly, while UAPA diagnosed in adult usually has UAPA on the right side without associated congenital anomaly. 儿童时期明确诊断的一侧肺动脉缺如多合并有心血管畸形 ,且左肺动脉缺如多见 ,成年人明确诊断的单发一侧肺动脉缺如多为右肺动脉缺如。