Not known Factual Statements About 癌症
癌症是以异常细胞生长为特征的众多疾病的统称，这些异常细胞会失控地分裂，并能浸润和毁坏正常身体组织。癌症通常可以扩散到全身各处。另類醫學的治療方式包含許多種類的系統或療法，此類治療以現代醫學標準的觀點來看，通常不被認為是有效及安全的。但是醫師仍然可以利用這樣的治療方法來「補充」標準治療所不能提供的，例如身體的舒適或是心靈上的平靜，重燃起患者對治療癌症的希望。
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。
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。
您周围的环境可能含有会导致患癌风险增加的有害化学物质。即使您不吸烟，但如果您前往有人吸烟的地方或是与吸烟者同住，您也可能会吸入二手烟。家里或工作场所的化学物质（如石棉和苯）也会增加患癌的风险。
Those who survive cancer develop a second Key cancer at about twice the rate of Those people never ever diagnosed.[208] The elevated chance is considered to become mainly because of the random possibility of acquiring any most cancers, the likelihood of surviving the main cancer, the same chance things that made the 1st most cancers, unwelcome Negative effects of dealing with the 1st most cancers (specially radiation therapy), and improved compliance with screening.[208]
放射治療可用來治療發生在各個部位的固态瘤，包括腦、乳房、子宮頸、咽喉、肺、胰、前列腺、皮膚、胃、子宮或軟組織的肉瘤，治療白血病和淋巴瘤有時也會使用輻射。放射治療所使用的輻射劑量取決於多項因素，例如癌症種類以及是否有可能破壞週遭組織和器官。如同其他的治療方式，放射治療仍然有其副作用存在。
Engraving with two sights of a Dutch lady who experienced a tumor faraway from her neck in 1689 Cancer has existed for all of human historical past.[226] The earliest created record relating to cancer is from c. 1600 BC within the Egyptian Edwin Smith Papyrus and describes breast most cancers.[226] Hippocrates (c. 460 BC – c. 370 BC) explained various varieties of cancer, referring to them With all the Greek word καρκίνος karkinos (crab or crayfish).[226] This identify emanates from the appearance in the Lower surface of the reliable malignant tumor, with "the veins stretched on all sides because the animal the crab has its feet, whence it derives its title".
无法停止不受控制的细胞增长。正常细胞知道何时停止增长，因此每种类型的细胞都有合适的数量。癌细胞失去命令其何时停止增长的控制（肿瘤抑制基因）。肿瘤抑制基因的突变使癌细胞继续增长和积累。
Replication of the info contained within the DNA of living cells will probabilistically lead to some mistakes (mutations). Intricate error correction and prevention are created into the method and safeguard the cell towards cancer.
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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。
If a human could Stay extended enough, it truly is inescapable that at the least certainly one of her or his cells would eventually accumulate a set of mutations enough for most cancers to establish. ^
The results 癌症 that final result rely on cancer's type and placement. Couple signs are unique. A lot of routinely manifest in individuals who produce other situations. Most cancers is usually tough to diagnose and might be considered a "fantastic imitator".[33]