Primary adenocarcinoma of the duodenum is a rare clinical condition, accounting for only 5% of all gastrointestinal neoplasms and 0.5% of all intestinal neoplasms. Nonspecific clinical presentation contributes to the majority of cases being diagnosed in advanced stages. The prognosis is poor, with a median survival of five years, varying from 23% to 57% in patients undergoing curative surgery (cephalic duodenopancreatectomy).