title: An elusive etiology of upper gastrointestinal bleeding in a young man: testis tumor.
abstract: Herein, we present a case of testicular tumor in a young patient in whom the initial symptom was upper gastrointestinal bleeding secondary to duodenal invasion by retroperitoneal lymph node involvement. Although melanoma, renal, breast, bronchogenic, and gastric carcinoma are the most common metastatic tumors of the small bowel, testicular tumors should be considered in the differential diagnosis of duodenum invasion in a young man because they are the most common tumor in this age group.
authors.affiliation: Department of Gastroenterology, Türkiye Yüksek İhtisas Hospital, Ankara, Turkey. koksalas@yahoo.com
authors.forename: Aydin S
authors.initials: AS
authors.lastname: Köksal
authors.forename: Ertuğrul
authors.initials: E
authors.lastname: Kayaçetin
authors.forename: Serkan
authors.initials: S
authors.lastname: Torun
authors.forename: Zeki E
authors.initials: ZE
authors.lastname: Güneş
authors.forename: Neslihan I
authors.initials: NI
authors.lastname: Zengin
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004379:Duodenal Neoplasms / Q000150:complications / Q000175:diagnosis / Q000556:secondary*; D016099:Endoscopy, Gastrointestinal; D017809:Fatal Outcome; D005500:Follow-Up Studies; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008297:Male; D009373:Neoplasms, Germ Cell and Embryonal / Q000150:complications / Q000175:diagnosis / Q000556:secondary*; D013736:Testicular Neoplasms / Q000150:complications / Q000473:pathology*; D014057:Tomography, X-Ray Computed