Characteristics of Colon Cancer Detected by Mass Screening. A Study of Effective Surveillance in Mass Screening for Colorectal Cancer.

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  • 大腸集検発見癌の特徴　検診の効果的・効率的サーベイランスについて
  • -A Study of Effective Surveillance in Mass Screening for Colorectal Cancer-
  • 検診の効果的・効率的サーベイランスについて

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Abstract

Recently, much attention has been paid to mass screening aiming at early detection and improving of prognosis of colorectal cancer in Japan. Sixty-four cancers in 54 patients who underwent mass screening were studied.<BR>They were classified into three groups : group A (those who underwent mass screening every year and were positive in occult blood test for the first time), group B (those who underwent mass screening for the first time and were positive in occult blood test), and group C (those who underwent mass screening and were positive in occult blood test a few times but did not undergo further examination by barium enema or colonofiber-scopy).<BR>Early and small-sized colorectal cancer was found in most patients in group A. Advanced colorectal cancer was found in 22% in group B, and 20% in group C.<BR>Therefore, people in group B and C should be encourage to undergo mass screening regularly.

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