Acalculous biliary pain

[Rihanna]

Acalculous biliary pain is biliary colic without gallstones, resulting from structural or functional disorders; it is sometimes treated with laparoscopic cholecystectomy.
(See also Overview of Biliary Function.)
Biliary colic can occur in the absence of gallstones, particularly in young women. Acalculous biliary pain accounts for up to 15% of laparoscopic cholecystectomies. Common causes of such biliary pain include the following:

Microscopic stones—not detected by routine abdominal ultrasonography
Abnormal gallbladder emptying (gallbladder dyskinesia)
Biliary tract hypersensitivity
Sphincter of Oddi dysfunction (including stenosis and biliary dyskinesia [1])
Hypersensitivity of the adjacent duodenum
Gallstones that have spontaneously passed