This patient just had a large colon polyp removed that looked different than normal. If the biopsy shows abnormal cells, the doctor may wish to repeat the colonoscopy and closely re-examine this area at a future time. To be sure that the exact same spot is identified, the doctor may "tattoo" the colon by injecting a small amount of sterile black pigment adjacent to the polypectomy site. Like a sign along the highway, this tattoo marks the location with a permanet black spot that can be easily found at the next colonoscopy exam.

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Three Rivers Endoscopy Scope Cam Tattooing the Colon