Cachexia and Invisible Stomach on Endoscopy: An Endoscopist's Enigma and a Surgeon's Axiom.

Gastroduodenal intussusception (GDI) is a very rare clinical entity in adults. GDI can present acutely or chronically in adults with varying spectrum of symptoms and signs. GDI can present acutely with abdominal pain, vomiting and palpable mass.