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：
有效的公共卫生策略，包括基于社区和家庭的护理，对于为患者及其家庭提供止痛和姑息治疗至关重要。
Cancers generally arise from an assemblage of mutations and epimutations that confer a selective advantage bringing about clonal growth (see Area defects in progression to cancer). Mutations, nevertheless, may not be as frequent in cancers as epigenetic alterations.
大脑和神经系统问题。癌症会压迫到附近的神经，导致身体某一部位疼痛和丧失功能。累及大脑的癌症可能导致头痛和卒中样体征和症状，例如身体一侧无力。
Most cancers analysis may cause psychological distress and psychosocial interventions, for example chatting therapy, may perhaps help people with this.
Individuals who endure cancer establish a 2nd Key cancer at about 2 times the speed of those never diagnosed.[208] The greater hazard is considered for being due to the random probability of acquiring any cancer, the likelihood of surviving the 1st most cancers, the identical possibility elements that made the 1st most cancers, unwelcome Negative effects of dealing with the main most cancers (particularly radiation therapy), and much better compliance with screening.[208]
中医治疗作为我国的传统特色，我们也专门总结了一篇中医治疗方法(详见，放链接)。 中医主要用于治疗晚期癌症，包括肺癌、胃癌、肝癌、结直肠癌、乳腺癌、淋巴瘤、 食管癌、鼻咽癌等，有时还可联合化疗或放疗，以缓解不良反应，提高疗效。同时， 中医在术后恢复方面也有较好的应用效果。
[one hundred and five] Each individual of those alterations regulates gene expression without altering the underlying DNA sequence. These changes may possibly remain by cell divisions, endure for a number of generations, and will be considered as reminiscent of mutations.
Community indicators might manifest due to mass in the tumor or its ulceration. Such as, mass outcomes from lung most cancers can block the bronchus resulting in cough or pneumonia; esophageal most cancers can cause narrowing on the esophagus, making it hard or distressing to swallow; and colorectal cancer may possibly lead to narrowing or blockages while in the bowel, influencing bowel routines. Masses in breasts or testicles may well produce observable lumps.
參加臨床實驗的病患有機會得到其所參與實驗的新療法的幫助，但是新的治療方式並不保證會有良好的結果，新療法也可能有未知的風險，嚴重的話甚至會導致死亡。但如果新療法成功的話，接受實驗的病人可能會最先受益。臨床實驗在美國有相當嚴格的進行規範，無論是在人選的選擇以及藥物劑量都有標準操作原則。以避免研究者為了加速研發新藥物，不顧病患的權益，貿然在人體上進行高風險的新療法測試。實際上有許多例子也顯示，即使是通過嚴格標準篩選出可進入臨床實驗階段的抗癌藥物，在臨床上的結果並未如預期的有效。這樣的結果也反映癌症的多原性以及人體系統的複雜度，我們在抗癌藥物的研發上仍有漫長的路途要走。
Palliative treatment could possibly be bewildered with hospice and as a consequence only indicated when people today technique finish of daily life. Like hospice care, palliative treatment tries to aid the client cope with their instant needs and to enhance ease and comfort.
第四步——原位癌，受影响的细胞在生长和外观上变得更加不正常。如果肿瘤尚未 突破组织之间的任何界限，则称为原位癌。这种肿瘤可能会无限期地存在；然而， 一些细胞最终可能获得额外的突变（蓝色）。
If a human could Stay extended enough, 癌症 it is actually unavoidable that at least considered one of his or her cells would inevitably accumulate a set of mutations enough for most cancers to build. ^
惡性轉移的症狀：淋巴結腫大、咳嗽、咳血、肝腫大、骨頭疼痛、骨骼因腫瘤轉移影響發生骨折以及神經系統的症狀。雖然癌症末期會出現疼痛的現象，但疼痛往往並不是惡性轉移發生的症狀。