The new methods of capsule endoscopy (CE) and double-balloon endoscopy (DBE) have revolutionized the diagnostic approach to middle (mid) gastrointestinal bleeding (MGIB) in recent years. DBE also has therapeutic options and enables us to treat the MGIB endoscopically. In this review, we discuss endoscopic diagnosis and management of three major categories of sources of MGIB — vascular lesions, ulcers/erosions and tumors/polyps.
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