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It is widely believed that stem cells are the relevant target cells for colonic cell transformation. Evidence is presented that a proliferative transit daughter cell acquiring a mutant adenomatous polyposis coli gene during upward migration from the crypt base can develop retention abnormalities and permanence in the crypt, thus qualifying as a transformed clone which is retained in the colonic epithelium.
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Sergio A. Lamprecht (2002) studied this question.
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