Pulmonary Vein Stenosis 40 year old female presents with tachycardia, fatigue and dyspnea. Echocardiogram suggested narrowing of the left upper lobe pulmonary vein4 chambered T2 weighted MRI in the axial plain shows narrowing of the left lower lobe pulmonary vein(red arrow, (a) with upstream dilationheart examination is otherwise normal.At its narrowest point the pulmonary vein measures 4.3mm and the vein proximal to the narrowing measures 8.4mm (b)Small bilateral pleural effusions are likely physiologicalkey wordsleft lower pulmonary vein narrowed between the aorta and left atrial wallAshley Davidoff Pulmonary Vein Occlusion and Encasement by Sarcoidosis OCCLUDED LEFT LOWER PULMONARY VEIN (red arrow)SARCOIDOSIS, STAGE IV, PTX, ENCASEMENT Ashley Davidoff MD OCCLUDED LEFT LOWER PULMONARY VEIN (red arrow)SARCOIDOSIS, STAGE IV, PTX, ENCASEMENTAshley Davidoff MD See Lung Section