The "T" vein.
Caggiati
Alberto
A
D003880:Dermatology / Q000266:history; D049672:History, 19th Century; D006801:Humans; D008488:Medical Illustration / Q000266:history; D012501:Saphenous Vein / Q000033:anatomy & histology*; D014648:Varicose Veins / Q000473:pathology