Partial anomalous pulmonary venous connection characterizes a direct connection between the pulmonary veins and the right atrium or venous system. This condition is physiologically explained in the recirculation of oxygenated blood through pulmonary vasculature to the arterial system. Patients who have this condition exclusively are usually asymptomatic. During a routine human anatomy dissection, a vein which presented a variable path near the left lung hilum was observed. Following the dissection to observe its path, it was identified as the left upper pulmonary vein. However, its drainage was in the left brachiocephalic vein, which described a pattern of anatomical variation. In the present case, as there is only one abnormality present in the left upper pulmonary vein, it was suggested that the patient was asymptomatic, as the characteristic had only been observed post mortem by chance, with no correction performed. Raising awareness of this condition can help medical students around the world to diagnose it.
