癌症有超過一百個種類，一般可依據癌細胞原發部位來分類，例如肺癌、乳癌等；另外能根據不同組織或細胞做以下分類：
Genetic adjustments can occur at unique ranges and by diverse mechanisms. The gain or loss of a complete chromosome can happen by way of faults in mitosis. A lot more prevalent are mutations, that are alterations in the nucleotide sequence of genomic DNA.
Some substitute therapies happen to be investigated and proven to get ineffective but nevertheless continue on to get promoted and promoted. Most cancers researcher Andrew J. Vickers stated, "The label 'unproven' is inappropriate for such therapies; it really is time to assert that many option cancer therapies have been 'disproven'."[204]
最近幾十年的研究中，最為確定的發現就是抽煙和癌症間密切的相關性，許多流行病學研究也已經證實這樣的關係。根據美國的數據顯示，隨著吸煙人數增加，肺癌的死亡率急劇升高。隨著近年來廣為宣導抽菸對身體的傷害之後，抽菸人口的減少，也反映在肺癌死亡率降低上。
癌症的症状多样，除可引起局部压迫和阻塞等症状外，还可因浸润和转移而导致相应的临床表现，有时会出现贫血、发热、体重下降、夜汗、感染、恶病质等全身表现。
By contrast, if you click a Microsoft-offered advert that appears on DuckDuckGo, Microsoft Promotion will not affiliate your advert-click conduct which has a 癌症 user profile. Furthermore, it does not retailer or share that information and facts other than for accounting needs.
Connect with Some others like you for assist and responses in your thoughts inside the Most cancers aid group on Mayo Clinic Link, a individual Group.
请协助補充可靠来源以改善这篇条目。无法查证的內容可能會因為異議提出而移除。
我们也将为大家提供更详细的文章介绍每种类型的癌症成因、治疗方法、术后恢复 以及成活率等大家关注的问题。另外由于网站维持需要一定的资金支持，所以部分 内容的查阅需要收取一定的费用，希望能够获得您的理解与支持。
癌症是一種複雜的疾病，其特徵是異常細胞在體內不受控制地生長和擴散。要徹底了解什麼是癌症，重要的是要探索細胞生長、腫瘤形成、良惡性腫瘤分化以及癌細胞如何在全身擴散所涉及的基本過程。 所有癌症我們的使命是提供明確、富有同情心的支持和專門針對每位患者需求的全面護理。 癌症是如何發展的
化学致癌物，例如石棉、烟草烟雾成分、酒精、黄曲霉毒素（一种食品污染物）、 砷（一种饮水污染物）、烷化剂、酰化剂、亚硝胺类、芳香胺、环氧化物等；巴豆油、 激素、酚类等物品，会增加致癌物质的效应。
身体的化学变化。癌症会打乱您体内正常的化学平衡，增加出现严重并发症的风险。化学失衡的体征和症状可能包括过度口渴、尿频、便秘和意识混乱。
Deficient expression of DNA restore proteins because of an inherited mutation can increase cancer risks. People today using an inherited impairment in almost any of 34 DNA mend genes (see post DNA maintenance-deficiency problem) have increased cancer chance, with some defects making certain a one hundred% lifetime possibility of cancer (e.
The results that consequence depend on cancer's sort and site. Few signs are precise. Numerous usually come about in people who produce other conditions. Cancer could be tough to diagnose and might be deemed a "wonderful imitator".[33]