Chest X-ray of the same patient as the picture above. A small crescent of air can be seen under the right part of the diaphragm, caused by<unk> 's sign. However, it could easily be mistaken for free intra-abdominal air (pneumoperitoneum) which could mistakenly be attributed to bowel perforation.<unk>  is a rare condition when pain occurs due to transposition of a loop of large intestine (usually transverse colon) in between the diaphragm and the liver, visible on plain abdominal X-ray or chest X-ray. Normally this causes no symptoms, and this is called<unk> 's sign. The sign can be permanently present, or sporadically. This anatomical variant is sometimes mistaken for the more serious condition of having air under the diaphragm (pneumoperitoneum) which is usually an indication of bowel perforation, possibly leading to surgical interventions.<unk>  refers only to complications in the presence of<unk> 's sign. These include abdominal pain, torsion of the bowel (transverse colon volvulus) or shortness of breath.
Chilaiditi syndrome
Pneumoperitoneum
Behçet's disease
Neuro-Behçet's disease
Crome syndrome
Rhinitis medicamentosa
Hereditary angioedema
Urticarial syndromes