良性腫瘤指腫瘤細胞未發生轉移與侵入周遭組織的情形，反之則稱為惡性腫瘤，多數會影響生理功能的腫瘤都是惡性腫瘤。
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The tissue diagnosis from your biopsy suggests the kind of cell that's proliferating, its histological grade, genetic abnormalities and also other capabilities. Collectively, this information and facts is beneficial to evaluate the prognosis also to pick the very best therapy.
Radiation therapy is Employed in about fifty percent of situations. The radiation is often possibly from interior sources (brachytherapy) or exterior resources. The radiation is mostly small energy X-rays for managing pores and skin cancers, when higher Power X-rays are used for cancers inside the entire body.[193] Radiation is typically utilized in addition to surgical procedure and/or chemotherapy.
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只有一小部分癌症是由于遗传疾病所致。如果癌症在您的家族中较为常见，则突变可能从一代传给下一代。您可能适合接受基因检测，以确认您是否遗传了可能增加某些癌症风险的突变。请记住，遗传基因突变并不表示肯定会罹患癌症。
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This is predicated upon the blamers' perception that the whole world is fundamentally just and so any dangerous health issues, like cancer, must be a variety of punishment for terrible selections, since in a just world, terrible items wouldn't take place to excellent men and women.[246]
腫瘤較小且尚未擴散/轉移（癌細胞可被定位、手術移除，不需借助循環全身的化學藥物治療）
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癌症早期症狀多不明顯，篩檢能夠早期發現癌症或其癌前病變，經早期診斷治療後，除了可以大幅降低死亡率外，也能阻止癌前病變細胞發展為癌症。
Human immunodeficiency virus (HIV) does indirectly induce most cancers however it brings about immune deficiency that will Enlarge the chance on account of other infections, occasionally approximately a number of thousandfold (in the situation of Kaposi's sarcoma). Importantly, vaccination versus the hepatitis B virus as well as human papillomavirus are actually revealed to almost reduce the potential risk of cancers attributable to these viruses in persons efficiently vaccinated 癌症 prior to an infection.
癌症治療會有許多後遺症，過程十分不易，因此治療後的照顧相當重要，包括疼痛控制、改善食慾、心理調適等，需要不同醫療團隊的合作，提高癌症病人的生活品質。（延伸閱讀：不是放棄治療！剖析緩和與安寧照護的真相）
惡性轉移的症狀：淋巴結腫大、咳嗽、咳血、肝腫大、骨頭疼痛、骨骼因腫瘤轉移影響發生骨折以及神經系統的症狀。雖然癌症末期會出現疼痛的現象，但疼痛往往並不是惡性轉移發生的症狀。