Vena metatarsus refers to a vein that is located in the foot, specifically in the metatarsal region. As a specialty term, the vena metatarsus may also be referred to by many different synonyms including the dorsal metatarsal vein, the metatarsal vein, or the dorsal digital vein of the hallux. Other possible synonyms for the vena metatarsus may include the deep plantar vein, the medial plantar vein, the inferior vena cava or the plantar digital veins. Despite having many different synonyms, all these terms refer to the same vein that is essential for proper circulation in the foot and the lower leg.