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암이란 무엇인가

저작시기 2008.03 |등록일 2011.03.19 파워포인트파일MS 파워포인트 (pptx) | 26페이지 | 가격 1,000원

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암의 발생원인과 암의 발생과정

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The Nature of Cancer
1. Tumors arise from normal tissue
Normal Tumor
◆ Tumor
The nineteenth-century discovery that all cells of an organism descend from the fertilized egg led to the realization that tumors are not foreign bodies but growths derived from normal tissue. The comparatively disorganized tissue architecture of tumors pointed toward cancer being a disease of malfunctioning cells.
정상세포가 어떠한 자극을 받아 유전자의 형질이 바뀜으로써 세포의 모양과 기능이 변하고, 이러한 변형세포가 주변 정상조직보다 과도한 증식을 하여 생긴 조직 덩어리
Abnormal regulation of cell growth
- Abnormal cell-cell interactions
1. Tumors arise from normal tissue
Invariably, detailed examination of the organization of cells within tumor masses gave evidence of a tissue architecture that was less organized and structured than the architecture of nearby normal tissues.

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