How do you determine if ibs diarrhea is due to scleroderma?

See below: Colonoscopies are typically performed to aid in the diagnosis.

Scleroderma of bowel: Scleroderma of the bowel can be recognized by an endoscopic examination done by a gastroenterologist. Because of the overgrowth of blood vessels in the intestines one can get the picture of a "watermelon"intestines. On xray the intestines loog k like a stack of coins.