The aim of our work is to review available imaging modalities and techniques used to evaluate small bowel neoplasms and to discuss the CT appearance of typical small bowel neoplasms.

Small bowel tumours are rare, accounting for 3-6% of gastrointestinal tumors. They are often clinically silent or have nonspecific symptoms so that an early diagnosis is usually difficult and only made when patients develop an advanced stage of the disease. The most common manifestations are abdominal pain, typically intermittent, nausea, vomiting, weight loss, jaundice, gastrointestinal bleeding, obstruction, and perforation. Symptomatic tumors are more commonly malignant. Although the differential diagnosis for a small bowel tumor is extensive, various small bowel neoplasms have characteristic features at computed...

In this work, we outline the important pathophysiologic characteristics of primary neoplasms of the small intestine including their changing epidemiology, risk factors for development, and relative frequency in each individual small intestine segment. Multiphase CT is the protocol of choice for the detection of many of these neoplasms, because some tumors are best visualized in the arterial phase and others in portal phase. We review the wide range of malignant and benign small bowel tumors and tumor-like lesions including carcinoid, adenocarcinoma, lymphoma, gastrointestinal stromal tumors,...

The epidemiology of primary neoplasms of the small intestinal is rapidly changing primarily because of the rising incidence of carcinoid tumors. The location, size, and morphologic characteristics of a mass visualized on imaging provide the radiologist with a basis for a rational differential diagnosis

1. Levy AD, Taylor LD, Abbott RM et al. Duodenal Carcinoids: Imaging Features with Clinical-Pathologic Comparison. Radiology 2005; 237:967-972. 2. Gülgün Engin et al. Gastrointestinal lymphoma: a spectrum of fluoroscopic and CTfindings. Diagnostic and interventional Radiology 2011;17:255-265. 3. Nerine D, Fishman EK, Jones B. CT of the small bowel and mesentery. Radiol Clin North Am. 1989;27:707–15. 4. Herlinger H, Maglinte DDT. Clinical imaging of small bowel intestine. New York: Springer-Verlag; 1999. 5. Jeffree MA, Barter JS, Hemingway AP, Nolan DJ. Primary carcinoid tumors of the...