• A functional rather than mechanical obstruction of the intestines, associated with manifestations that resemble those caused by an intestinal obstruction, including distension, abdominal pain, nausea, vomiting, constipation or diarrhea, in an individual in whom a mechanical blockage has been excluded.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• A type of ILEUS, a functional not mechanical obstruction of the INTESTINES. This syndrome is caused by a large number of disorders involving the smooth muscles (MUSCLE, SMOOTH) or the NERVOUS SYSTEM.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Ileus of the intestine in which there is no mechanical obstruction.
  NCI
  U.S. National Cancer Institute, 2021
• The term intestinal pseudo-obstruction denotes a syndrome characterized by a clinical picture suggestive of mechanical obstruction in the absence of any demonstrable evidence of such an obstruction in the intestine. On the basis of the clinical presentation, pseudo-obstruction syndromes can be divided into acute and chronic forms.
  Medscape
  WebMD, 2025
• Intestinal pseudo-obstruction is a digestive disorder in which the intestinal walls are unable to contract normally (called hypomotility); the condition resembles a true obstruction, but no actual blockage exists. Signs and symptoms may include abdominal pain; vomiting; diarrhea; constipation; malabsorption of nutrients leading to weight...
  NIH Genetic and Rare Diseases
  National Center for Advancing Translational Sciences