title: [A 50 year-old man with abdominal tumor].
authors.forename: E M
authors.initials: EM
authors.lastname: Fonseca Aizpuru
authors.forename: F J
authors.initials: FJ
authors.lastname: Nuño Mateo
authors.forename: J
authors.initials: J
authors.lastname: Fernández Palacio
authors.forename: M J
authors.initials: MJ
authors.lastname: Menéndez Calderón
mesh_terms: D000008:Abdominal Neoplasms / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012509:Sarcoma / Q000175:diagnosis*