Celiac disease is associated with an increased risk of intestinal neoplasms. We report a case of jejunal adenocarcinoma in a 47 years old woman diagnosed with celiac disease, who did not follow a proper diet. The patient presented with diarrhea, abdominal pain and iron deficiency anemia. Oral endoscopy showed normal changes, whereas ultrasound and abdominal CT scan showed a thickened intestinal wall, which was not shown by the bowel transit and push enteroscopy. A capsule endoscopy showed a tumor, which was subjected to surgical resection, demonstrating the usefulness of this technique in the detection of neoplasms in celiac disease.