| 21. | Great care is taken to concentrate the radiation only on the cancerous tissue as far as is possible.
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| 22. | Sielaff operated three times over a two-year period, each time removing cancerous tissue from his abdomen.
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| 23. | "The cancerous tissue was confined to the part that was fully extracted, " he said.
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| 24. | If cancerous tissue was used, neurons might divide aberrantly in the laboratory because of the very nature of cancer.
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| 25. | Subsequent tests revealed the " existence of cancerous tissue, " prompting specialists to recommend him for chemotherapy.
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| 26. | However, the technique may disrupt the DNA in the new stem cells, resulting in damaged and cancerous tissue.
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| 27. | For more information on the exact epigenetic changes which take place in cancerous tissues, see the Cancer epigenetics page.
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| 28. | He said that on Thursday a surgeon froze a section of Mrs . Fletcher's cervix and removed cancerous tissue.
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| 29. | The toxins are now used to treat cancer patients by injecting fluorescent scorpion toxin into cancerous tissue to show tumor boundaries.
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| 30. | For example, decreased expression of BRCA1 in cancerous tissue has been linked with hypermethylation of the " BRCA1 " promoter.
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