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Persistent left superior vena cava
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Persistent left superior vena cava : ウィキペディア英語版
Persistent left superior vena cava

In anatomy, a persistent left superior vena cava (PLSVC) is the most common variation of the thoracic venous system, is prevalent in 0.3% of the population, and an embryologic remnant that results from a failure to involute.
==Presentation==
In PLSVC, the left brachiocephalic vein does not develop fully and the left upper limb and head & neck drain into the right atrium via the coronary sinus.
The variation, in isolation, is considered benign, but is very frequently associated with cardiac abnormalities (e.g. ventricular septal defect, atrioventricular septal defect) that have a significant mortality and morbidity. It is more frequent in patients with congenital heart defects.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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