<unk>  is the acute dilatation of the colon in the absence of any mechanical obstruction in severely ill patients. Acute colonic pseudo-obstruction is characterized by massive dilatation of the cecum (diameter > 10 cm) and right colon on abdominal X-ray. It is a type of megacolon, sometimes referred to as "acute megacolon," to distinguish it from toxic megacolon. The condition carries the name of the British surgeon Sir William Heneage<unk>  (1887–1971), who first reported it in 1948.
Ogilvie syndrome
Fitz-Hugh–Curtis syndrome
Havana syndrome
Löffler's syndrome
Secretan's syndrome
Lucey–Driscoll syndrome
Jackson–Weiss syndrome
Gómez–López-Hernández syndrome