Table 1 Diagnostic evaluation recommended based on US American Gastroenterological Association guidelines.

1. History and physical examination

2. Diagnostic testing

CBC

Chemistry panel

Sedimentation rate

Stool for O & P

Stool for occult blood

Flexible sigmoidoscopy

IF > 50, colonoscopy or barium enema and sigmoidoscopy

For diarrhea predominant:

Small bowel radiograph

Lactose/dextrose H2 breathing test

For constipation predominant:

Fiber trial

For pain predominant:

Plain film of abdomen