For diagnosis, measures of liver biochemistry and pancreatic enzymes are performed. Along with ruling out structural abnormalities, normally by performing an abdominal ultrasound and endoscopic retrograde cholangiopancreatography (ERCP). Measurements of bile transit when performing ERCP are taken to help evaluate different treatment options.<unk>  is best diagnosed using manometry-an internal test done to measure the pressures within surrounding ducts to determine whether or not the muscle is functioning normally.
Sphincter of Oddi dysfunction
Sphincter paralysis
Neurogenic bowel dysfunction
Retained antrum syndrome
Anorectal anomalies
Rectal foreign body
Functional constipation
Anal dysplasia