lunedì 10 marzo 2008

Screening per il tumore del colon: nuove linee guida

Il link che propongo rimanda alle nuove linee guida pubblicate su Cancer Journal for Clinicians da parte dell'American Cancer Society. Interessante notare come compaia per la prima volta, negli studi per lo screening, la colonscopia virtuale vale a dire la colonscopia fatta tramite TAC.

Queste a grandi linee le opzioni per lo screeening:
- sigmoidoscopia flessibile ogni 5 anni
- Clisma opaco ogni 5 anni
- Colonografia TAC ogni 5 anni
- Colonscopia ogni 10 anni

A questi test va aggiunta la ricerca del sangue occulto annuale.

New guidelines for colorectal cancer screening for the first time endorse the use of the stool DNA test and computed tomographic colonography, also known as virtual colonoscopy.

The updated guidelines for screening average-risk people aged 50 or older -- published online in CA: A Cancer Journal for Clinicians -- were issued by the American Cancer Society, the American College of Radiology, and three gastroenterology groups.

Also for the first time, the guidelines declare a preference for tests that can detect both cancer and precancerous polyps so that future cancers can be prevented. The groups endorse the following options for detecting both adenomatous polyps and cancer:

-- Flexible sigmoidoscopy every 5 years
-- Double-contrast barium enema every 5 years
-- Computed tomographic colonography every 5 years
-- Colonoscopy every 10 years

For primarily detecting cancer, the groups recommend the following test options if they have high sensitivity:

-- Guaiac-based fecal occult blood test annually
-- Fecal immunochemical test annually
-- Stool DNA test (the test interval remains uncertain, although the manufacturer recommends every 5 years)

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