[A case of abnormal venous drainage of the whole left lung into the left innominate venous trunk].

In this case, the drainage of all the left lung veins of gathered in a common trunk into the left innominate venous trunk was combined with an atrial septal defect and partition of the left atrium. The rarity of such cases in the literature is due to the fact that it is an uncommon anatomical anomaly and that very often it is symptomless, and therefore does not induce the subjects with this anomaly to seek medical advice. In the case reported, surgical treatment consisted in closing the atrial septal defect, resecting the abnormal left atrial partition and in re-establishing the drainage of the left lung veins into the left atrium through a wide latero-lateral anastomosis with ligature of the abnormal left pulmonary venous trunk as its junction with the left innominate venous trunk.