Pulmonary Artery Encasement Sarcoid OCCLUDED RML ARTERY (red arrow)SARCOIDOSIS, STAGE IV, PTX, ENCASEMENTAshley Davidoff MD SARCOIDOSIS, STAGE IV, PTX, ENCASEMENT of RML ARTERY (red arrow) TRICUSPID REGURGITATION. Ashley Davidoff MD SARCOIDOSIS, STAGE IV, PTX, ENCASEMENT of LEFT LOWER LOBE PA (red arrow)Ashley Davidoff MD Cancer Small Cell Carcinoma Occluding the Right Upper Lobe Pulmonary ArteryThe coronal image shows a centrally placed small cell carcinoma (green mass in right image) occluding the right upper lobe pulmonary artery (red ring).Images courtesy: Ashley Davidoff, M.D. TheCommonVein.net Lung cancer P 025 Arterial EncasementAshley Davidoff MD TheCommonVein.net lung ca 005