理論上，若是以手術完全移除腫瘤細胞，癌症是可以被治癒的。但並非總是如此簡單，外科手術通常無法切除已經轉移到其他部位的癌細胞。使用外科手術治療癌症的例子包括以乳房切除术治療乳癌或是進行前列腺切除術（英语：prostatectomy）治療前列腺癌。手術的目的在於移除腫瘤細胞或是整個器官，雖然將主要的腫瘤經外科手術切除，但仍有些潛伏在腫瘤所生長的器官週遭的單一腫瘤細胞是無法被察覺的。隨著時間過去，又會重新生長成一個新的腫瘤，稱為癌症復發。為此，手術切除下的腫瘤需要經病理學家的檢視，以確定切下的腫瘤週遭都是正常組織，減少腫瘤切除不完全的機會。
癌症是多种因素长期共同作用引发的基因异常疾病。当机体受到环境中的化学、物理、病毒等致癌物质的影响，和/或因自身遗传、内分泌、性别、年龄等因素的作用时，可发生一系列基因异常改变，形成恶性肿瘤。
Cancers comprise a considerable relatives of ailments that require abnormal mobile progress Using the possible to invade or distribute to other parts of the human body.
因p53突變而引起的李佛美尼症候群，會產生多種腫瘤，包含骨肉瘤、乳癌、軟組織肉瘤、腦瘤。
手术主要用于去除瘤灶，达到治疗的目的，同时也适用于癌症的预防、诊断、分期、术后结构重建与功能康复等。
Attainable harms from your screening take a look at: one example is, X-ray illustrations or photos entail exposure to likely dangerous ionizing radiation
全身性的症狀：體重減輕、食欲不振、惡病體質、大量出汗（夜間盜汗）、貧血
Western conceptions of sufferers' legal rights for people with most cancers incorporate a obligation to completely disclose the clinical circumstance to the person, and the best to engage in shared final decision-earning in a means that respects the person's own values. In other cultures, other rights and values are desired. As an example, most African cultures price entire families as an alternative to individualism. In portions of Africa, a prognosis is usually produced so late that get rid of is not possible, and treatment method, if readily available in any way, would quickly bankrupt the relatives. On account of these variables, African Health care vendors have a tendency to let loved ones come to a decision no matter if, when And just how to disclose the diagnosis, and they tend to take action slowly and circuitously, as the individual displays curiosity and an capability to cope With all the grim news.
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They've excellent field vacation possibilities for the zoo, that include subject trip alternatives, Trainer assets and faculty partnerships!
Taller individuals have an increased threat of cancer given that they have far more cells than shorter men and women. Considering the fact that top is genetically decided to a 癌症 substantial extent, taller folks have a heritable boost in cancer hazard.[88]
The physician John Hill described tobacco sniffing as the cause of nose most cancers in 1761.[229] This was followed by the report in 1775 by British surgeon Percivall Pott that chimney sweeps' carcinoma, a most cancers with the scrotum, was a standard ailment amongst chimney sweeps.
癌症的临床症状与发病部位、病变大小、是否转移等因素相关，早期可能无显著症状，随病变进展，可出现肿块、疼痛、出血、梗阻等局部症状，以及发热、乏力、贫血、消瘦等全身症状。
相反的，子宮頸抹片檢查在所有種類的癌症篩檢中則具有最好的成本效益。以公共衛生考量來看，子宮頸癌的病程發展通常十分緩慢，長達數年，又具有明顯的危險因子（性接觸），因此有相當高的機會可在癌症仍是早期時篩檢出來，最重要的是，抹片的成本很低，能夠大量推行。基於這些原因，一項癌症篩檢是否應該進行，民眾的健康改善程度和篩檢的成本與治療的風險都必須列入考慮。