The aortic "nipple". The left superior intercostal vein.
D000328:Adult; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging*; D001027:Aortography; D001401:Azygos Vein; D016121:Brachiocephalic Veins; D003097:Collateral Circulation; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008223:Lymphoma / Q000000981:diagnostic imaging; D008297:Male; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging; D008482:Mediastinum / Q000098:blood supply*; D010690:Phlebography; D014054:Tomography; D014680:Veins; D014683:Vena Cava, Superior