This atlas presents high-quality images of clinical cases of small bowel diseases, with a focus on the importance of terminal ileoscopy as the first step in detecting this group of rare pathologies. Among the conditions covered are celiac disease, inflammatory bowel disease, neoplasms, infections, and pediatric disease. The multidisciplinary approach to the presentation of clinical cases, with contributions from histology, radiology, capsule endoscopy, enteroscopy, and surgery, ensures that the atlas will provide an accurate learning course for beginners and also an effective update for specialists.​