Pancreatic anaplastic carcinoma (PAC) is a rare entity (2-7% of pancreatic carcinomas), with a mean survival of 5.7 months. We present the case of a 44-year-old patient who consulted for upper gastroin-testinal bleeding and was admitted hemodynamically unstable. CT showed a large mass in the gastric fundus with infiltration to the pancreas, suggestive of GIST. Esophagogastroduodenoscopy identified a submucosal ulcerated lesion that was intractable by this means. An emergency surgical resection was performed, and the histology confirmed a PAC. The patient evolved favorably, without recurrence after 5 years post adjuvant chemotherapy. Treatment with radical surgery plus adjuvant chemotherapy was effective.