Megaduodenum is a congenital or acquired dilation and elongation of the duodenum with hypertrophy of all layers that presents as a feeling of gastric fullness, abdominal pain, belching, heartburn, and nausea with vomiting sometimes of food eaten 24 hours prior. Megaduodenum does not let the muscles of the duodenum function properly, the movement of waste material in the intestines gets impaired, which in turn affects digestion and nutrition.