In-depth

Symptoms

Abdominal pain

Find out what causes different types of abdominal pain.

Anal pain

Rectal bleeding

Tests and diagnosis

Colonoscopy

Flexible sigmoidoscopy

Has your doctor recommended a flexible sigmoidoscopy exam? Here's what you need to know about preparation and the exam itself.

Needle biopsy

Find out what to expect during a needle biopsy.

June 12, 2012

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