title: Superior vena cava obstruction from Merkel cell carcinoma.
mesh_terms: D000230:Adenocarcinoma / Q000150:complications / Q000556:secondary*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012878:Skin Neoplasms / Q000473:pathology*; D013479:Superior Vena Cava Syndrome / Q000209:etiology*