不受限制的生長（不死，由於有大量端粒酶，細胞不受到細胞凋亡機制的調控）

癌是内衬皮肤、肺、消化道和内脏的细胞的癌。例如，皮肤癌、肺癌、结肠癌、胃癌、乳腺癌、前列腺癌和甲状腺癌。通常，癌更常发生于老年人。

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。

体重减轻。癌症和癌症治疗可能导致体重减轻。癌症肿瘤会夺取正常细胞的营养。这通常不受摄入多少卡路里或吃哪类食物的影响，而且难以治疗。在大多数情况下，通过管子将人工营养输入胃或静脉中并不能帮助改变体重减轻的状况。

從正常組織到腫瘤組織的形態變化 癌組織在顯微鏡下具有鮮明的外觀，主要是有大量分裂中的細胞、變大的細胞核、細胞大小與形狀改變、失去細胞特化的特徵、失去正常組織結構和細胞間的邊界變的不明顯。免疫組織化學染色法和其他分子生物學標記方法可根據腫瘤細胞的特徵提早發現腫瘤，而有助於診斷和預後。

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Superior to know: Beyond the prior controversy encompassing its revival and trademark debacle, Jim’s West is often a location that each locals and vacationers ought to revisit immediately.

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許多預防癌症的想法是根據流行病學的研究而來，分析病患的資料可發現生活方式或是接觸一些環境危險因子的確與特定癌症的發生機率相關。越來越多的證據顯示，根據流行病學研究所提出的建議改善，確實可以讓癌症發病率和死亡率降低。

Sang Kee has existed given that 1980, but remains 癌症 as lively a Component of Philly’s Chinatown cafe scene as ever (there’s also a stall at Looking at Terminal Market). It’s no surprise that roast meats like pork and, of course, Beijing’s personal duck, are a standout — although heading for The full duck dinner ($80 for 2; $152 for 4) practical experience is worthwhile, the fowl may also found building its way into everything from barbecue rice platters to pineapple fried rice to spring rolls.

用醫學影像技術檢測癌症，也遭遇類似問題。這些醫學影像檢測技術都是成本相當高且耗費時間。由於偵測的靈敏度極高，常發現細胞病變（英語：incidentaloma），這樣的腫瘤也可以被認為惡性，而進行具有潛在危險性的治療方法。

止痛藥，如嗎啡、羥可酮（英语：oxycodone）、止吐劑及其他藥物用來抑制噁心和嘔吐，都是常用來減輕癌症患者症狀的藥物。

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人乳头瘤病毒检测（包括人乳头瘤病毒核糖核酸和信使核糖核酸检测），这是宫颈癌筛查的首选方式；