某些癌症类型，如睾丸精原细胞瘤以及不同类型的儿童白血病和淋巴瘤，如果加以适当的治疗，即使癌细胞已经扩散到身体其它部位，治愈率也很高。
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允许其快速增长。基因突变可以命令细胞快速增长和分裂。这将产生许多具有相同突变的新细胞。
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肿瘤在其生长过程中，虽然能够暂时通过建立新生血管解决自身给养问题，但是快速的增长一样会将之推向资源和空间匮乏的边缘。隨著腫瘤細胞持續生長，在這樣競爭的壓力下，这时肿瘤就会扩散。而这种肿瘤在生长过程中侵略性不断增加的过程则被称为演进（progression）。具体的行为则是生长的加快，并且开始入侵周遭的正常组织（癌症浸润），并且通过血管转移到远端（癌症转移）。
第五步——浸润性癌，如果基因变化使肿瘤开始侵入下层组织，并使细胞脱落到血液或淋巴中， 则认为肿瘤已变成恶性肿瘤。癌变的细胞很可能在全身形成新的肿瘤（转移）；这些可能会因破坏重要器官而致命。
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Epigenetic alterations take place frequently in cancers. For example, 1 analyze mentioned protein coding genes that were usually altered inside their methylation in Affiliation with colon most cancers.
Experimental cancer remedies are studied in clinical trials to check the proposed remedy to the ideal current treatment.
神經膠質瘤：由神經膠質細胞變化成腫瘤，神經膠質細胞也是最主要的一種腦細胞類型。
Complementary and substitute most cancers treatment plans are a diverse team of therapies, procedures and products which aren't part of regular medicine.[202] "Complementary medicine" refers to procedures and substances applied in addition to common medicine, even 癌症 though "option medication" refers to compounds made use of as opposed to regular drugs.[203] Most complementary and different medicines for most cancers haven't been analyzed or analyzed using typical procedures such as clinical trials.
第四步——原位癌，受影响的细胞在生长和外观上变得更加不正常。如果肿瘤尚未 突破组织之间的任何界限，则称为原位癌。这种肿瘤可能会无限期地存在；然而， 一些细胞最终可能获得额外的突变（蓝色）。
Taller individuals have an elevated danger of cancer mainly because they have much more cells than shorter folks. Considering the fact that height is genetically determined to a substantial extent, taller individuals have a heritable boost in most cancers risk.[88]
癌症扩散。随着癌症进展，它可能扩散（转移）到身体其他部位。癌症扩散到哪里取决于所患癌症的类型。