title: Retroperitoneal yolk-sac tumour.
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis; D008297:Male; D008649:Mesonephroma / Q000175:diagnosis*; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*