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Colons epiteliale tumorer - Gastro.patologi.org

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Aberrerende krypt fokus (AKF)<br />

• Precursor læsion<br />

– Stammer fra dysplastiske stamceller i en<br />

enkelt krypt<br />

– Forstørrede krypter og ofte let dilaterede<br />

kryptlumina, fortykket epithel, nedsat<br />

mucinindhold<br />

– AKF med hyperplastiske træk med høj<br />

forekomst af K-ras mutation<br />

– AKF med neoplasi (mikroadenomer)<br />

associerede med APC mutation

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