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Definition of Proctosigmoidoscopy

Proctosigmoidoscopy: An examination of the rectum and the lower part of the colon, using a thin, lighted instrument called a sigmoidoscope.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=5056
Last Editorial Review: 3/19/2012

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