You have had a very comprehensive set of tests done. I probably can't think of any more testing - perhaps except a blood test to rule out celiac disease.
The fecal fat test possibly shows some malabsorption - however your fecal fat tests are borderline. You can consider either a biopsy or repeating the test. Another consideration would be empiric treatment of fat malabsorption, which you can discuss with your personal physician.
If the tests remain non-revealing, optimizing treatment for irritable bowel syndrome can be considered. This can be done by increasing the fiber in the diet or using anti-spasmodic agents.
These options can be discussed with your personal physician.
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.
Kevin, M.D.
kevinmd_
Please see my earlier comment - why is this guy polluting our website? Can't you block these offensive emails?
Liz.