Ileal tuberculosis is caused by Mycobacterium tuberculosis infection! Intestinal tuberculosis is the most common of the gastrointestinal tuberculosis. The vast majority of cases are secondary to extra-intestinal tuberculosis, especially cavernous tuberculosis. According to statistics, 25% to 50% of patients with pulmonary tuberculosis can be complicated by intestinal tuberculosis. The source of intestinal tuberculosis is mainly ingestive, caused by swallowing sputum containing Mycobacterium tuberculosis, occasionally from food contaminated with Mycobacterium tuberculosis, or from hematogenous or direct spread of tuberculosis from other organs of the abdominal or pelvic cavity. The pathology is divided into ulcerative, hyperplastic and mixed types. Differential diagnosis between ileal tuberculosis and other diseases: Other intestinal tuberculosis: sometimes it should be differentiated from intestinal malignant lymphoma, Yersinia enterocolitica and some rare infectious intestinal diseases such as Mycobacterium atypicalum (mostly seen in AIDS patients), venereal lymphogranuloma, syphilis invasion of the intestine, and intestinal actinomycosis. Fever is the main manifestation and should be differentiated from long-term febrile diseases such as typhoid fever. Confirmation of intestinal tuberculosis should be confirmed by the presence of Mycobacterium tuberculosis in the intestinal mucosal tissue, and intestinal tuberculosis should be considered if Young adults with extraintestinal tuberculosis, especially those with open tuberculosis presenting with GI symptoms, or with systemic manifestations of tuberculosis reappearing after improvement of the original lesions. Clinical manifestations include diarrhea, abdominal pain, right lower abdominal pressure, abdominal masses, intestinal obstruction of unknown origin, accompanied by fever, night sweats and other symptoms of tuberculosis toxemia. Ileal duplication malformation: It is a kind of small intestine duplication malformation! Duplication of small intestine refers to a cavernous organ with a circular or tubular structure on the near mesenteric side of the small intestine, which has the same tissue structure as the adjacent small intestine and its blood supply is also very close. Duplication of the small intestine can occur in any part of the small intestine, but ileus is the most common.