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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。
The conclusions that outcome count on cancer's form and location. Few indicators are precise. Lots of often happen in people who produce other problems. Most cancers may be difficult to diagnose and might be regarded a "terrific imitator".[33]
Cancers ordinarily come up from an assemblage of mutations and epimutations that confer a selective gain resulting in clonal expansion (see Subject defects in progression to cancer). Mutations, however, will not be as Recurrent in cancers as epigenetic alterations.
[188] The effectiveness of chemotherapy is often minimal by its toxicity to other tissues in your body. Even if chemotherapy does not offer a everlasting treatment, it could be helpful to reduce signs and symptoms which include agony or to decrease the measurement of an inoperable tumor from the hope that operation will turn into achievable Sooner or later.[citation required]
Attainable harms within the screening take a look at: such as, X-ray visuals entail publicity to perhaps dangerous ionizing radiation
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）和砷（一种饮水污染物）；
辐射（主要为电离辐射和紫外线）是明确的致癌物质，而异物刺激、创伤、慢性炎症等会促进恶变进程。
A further mutation within an oncogene could possibly cause the cell to breed more 癌症 rapidly plus much more frequently than its regular counterparts.
People to Woodland Park Zoo can check out an array of immersive reveals and engage in unique animal encounters, keeper talks, and interactive educational programs.
Some sluggish-increasing cancers are specially popular, but typically are not fatal. Autopsy reports in Europe and Asia showed that as many as 36% of individuals have undiagnosed and apparently harmless thyroid most cancers at enough time of their deaths Which eighty% of Males acquire prostate cancer by age eighty.
The incidence of lung most cancers is very correlated with using tobacco. Publicity to certain substances are connected to unique kinds of most cancers. These substances are known as carcinogens.
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；
术前要综合评估恶性肿瘤侵及层次、范围以确定手术方式及切除范围，应尽可能争取将肿物完全切除，减少转移的可能，术后标本应送病理明确肿瘤类型、分期、有无转移等信息，以指导术后治疗。