title: [Pleural effusion and mediastinal mass in a 21-year-old male].
authors.affiliation: Servicio de Medicina Interna, Ciutat Sanitària i Universitària de Bellvitge, L'Hospitalet de Llobregat, Barcelona.
authors.forename: M J
authors.initials: MJ
authors.lastname: Barberá
authors.forename: R
authors.initials: R
authors.lastname: Casas
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000473:pathology*; D016066:Pleural Effusion, Malignant / Q000473:pathology*; D018228:Sarcoma, Small Cell / Q000473:pathology*