In this chapter, we are demonstrating representative endoscopic findings of miscellaneous duodenal diseases: duodenal diverticulum, angiodysplasia, and duodenal varix. Also, in Henoch-Schonlein purpura, the duodenum is the most frequent site of gastrointestinal manifestation. Ascaris lumbricoides is associated with malnutrition, iron-deficiency anemia, and growth retardation.
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