癌細胞擴散至距離原始腫瘤遙遠的器官及組織。此時癌細胞流竄於全身，必需借助循環全身的化學治療藥物治療。安寧照護將是治療選項之一。
在正常细胞生长期间经常会发生基因突变。但细胞含有一种可识别何时发生错误并修复错误的机制。有时会漏掉某种错误。这种情况可能导致细胞癌变。
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。
Cancer screening just isn't accessible for quite a few different types of cancers. Even when checks are offered, they is probably not recommended for everybody. Common screening or mass screening includes screening Absolutely everyone.
初次就诊科室与起病症状有关，明确患有癌症者可根据目的到肿瘤科、外科、放疗科等就诊。
癌症篩檢，是希望在一般大眾身上提早找出潛在未發現與早期無症狀的癌症。所進行的測試必須適合廣大民眾能夠負擔，並且安全，無侵入性而且不易有假陽性結果產生。一旦發現癌症的跡象，更精確的後續檢驗，或使用侵入性手術取得組織切片以確定篩檢結果則是必要的。
Radiation into the breast minimizes the ability of that breast to supply milk and boosts the risk of mastitis. Also, when chemotherapy is given soon after beginning, many of the drugs surface in breast milk, which could hurt the baby.[271]
Cancer diagnosis may cause 癌症 psychological distress and psychosocial interventions, including speaking therapy, may possibly aid individuals with this.
您可以通过改变这些习惯来降低患癌风险，尽管有些习惯比其他习惯更难改变。
Some treatments can interfere Along with the mother's capacity to give delivery vaginally or to breastfeed.[271] Cervical cancer may well need start by Caesarean section.
根治性手术：癌症局限或仅累及区域淋巴结及邻近组织，没有远处转移，手术可将它们一并切除。该术式并不能保证治愈，部分患者会复发或转移。
Palliative treatment is therapy that makes an attempt that can help the patient come to feel improved and may be coupled with an attempt to deal with the cancer. Palliative care involves motion to reduce Bodily, emotional, spiritual and psycho-social distress.
作为加速消除宫颈癌全球战略的一部分，提供全球领导和技术援助，支持各国政府及其合作伙伴建立和维持高质量的宫颈癌控制规划；
主要原理是使用高專一性的單株抗體直接結合到腫瘤細胞特有的蛋白質或是細胞激素，影響腫瘤細胞的生長、引起免疫系統反應或是其他功能。已經發展的藥物有針對乳癌的曲妥珠单抗和針對白血病的吉妥单抗在臨床使用。