Oily stools may be indicative of several diseases. Specifically, malabsorption (i.e. fat malabsorption.
biliaryBile duct obstruction
Biliary atresia
Biliary obstruction - series
Biliary stricture
Biopsy - biliary tract
Gallbladder disease
Gallbladder radionuclide scan
Primary biliary cirrhosis disease or celiac disease) and chronic pancreatitis can cause oily stools.
I would suggest discussing further tests to evaluate this. This can include fecal fat tests, an abomdinal ultrasound evaluating the gallbladder, and blood tests for celiac disease. Pancreatic enzymes - i.e. amylase and lipase - as well as imaging (such as plain films or an abdominal CT scan), can also be considered.
You may also want to consider a colonoscopy as part of the evaluation for the chronic loose stools.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.