LAUSR

Highlights • We present a case of a small bowel adenocarcinoma at an advanced stage, following surgery and adjuvant therapy for colorectal adenocarcinoma, with an atypical presentation at the emergency room, as a rare cause of obstructive small bowel intussusception.• After a successful removal of a carcinoma in the large bowel, there is a higher risk for developing a further primary (metachronous) large bowel tumor. However metachronous carcinomas affecting small bowel are rarer.• Small Bowel adenocarcinoma (SBA) is a rare malignant neoplasm without specific signs and symptoms, and associated with late stage disease presentations.• Patients who develop a small or large bowel adenocarcinoma are at high risk for a second cancer at both sites. However data available to guide therapeutic decisions for those presenting one at small bowel are scarce, and the role of adjuvant therapy in patients who undergo curative resection is unclear.• Studies about strategies for detection at an earlier stage, optimal treatment and prognosis are mandatory for this disease.