有异常临床症状者应考虑患有癌症的可能，尤其是发现局部肿块者，结合实验室及影像学检查可辅助诊断癌症，但最终明确癌症的类型、分期等信息，需要依靠病理学检查。
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All youth ages 12 and beneath need to be accompanied by a dependable adult or lawful guardian all over their visit. Some ordeals may well call for adult supervision.
Those with cancer have an increased risk of blood clots in their veins that may be everyday living-threatening.[210] The usage of blood thinners for example heparin reduce the risk of blood clots but have not been demonstrated to increase survival in people with most cancers.[210] Folks who get blood thinners even have an increased danger of bleeding.[210]
For many popular cancers, the English organ identify is used. For instance, the commonest sort of breast most cancers is named ductal carcinoma on the breast. In this article, the adjective ductal refers to the looks of cancer underneath the microscope, which indicates that it's originated inside the milk ducts.
治療某些白血病和淋巴瘤則需要使用高劑量的化療或全身放射治療。這樣的治療方式是先將患者原有的骨髓細胞完全破壞，避免進行骨髓細胞移植時發生排斥作用。進行骨髓移植之後，依靠患者本身的復原能力，重新進行造血功能。移植的來源除了接受親屬或配對符合的捐贈者之外，也可將病患本身的骨髓細胞以及周邊造血幹細胞（英语：peripheral blood stem cell）先取出存放待日後移植所需，稱為自體移植（英语：autologous transplantation）。
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）；
Little ones can see Individuals cheeky red pandas Participate in, or observe Individuals tall giraffes get to the leaves. There are playful primates, 癌症 and sleepy hippos, you will find Large animals just like the grand lion, to your teeny ocelot.
原理：它可以通过激发、增强机体的免疫功能，达到控制、杀灭肿瘤的目的。
Radiation may cause most cancers for most portions of your body, in all animals and at any age. Kids are 2 times as more likely to build radiation-induced leukemia as adults; radiation publicity ahead of birth has ten occasions the outcome.[76]
除了切除原發性腫瘤之外，癌症的病程分期（英语：staging）也需要手術的協助。例如，確定腫瘤惡化的程度與是否發生淋巴結轉移。病程分期主要可用來推測預後和是否需要實行輔助治療（英语：adjuvant therapy）。有時手術也被用來控制症狀以減輕病人痛苦，如脊髓壓迫或腸阻塞，稱為紓緩治療。
The physician John Hill described tobacco sniffing as the reason for nose cancer 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 typical ailment amongst chimney sweeps.
恶性肿瘤生长迅速，可在短时间内快速增大，为外生性或浸润性生长，影像学检查通常界限不清，常继发出血、坏死、溃疡等变化，组织病理学特征为分化差、异型性大、可见病理性核分裂像，对机体的伤害大，会破坏机体组织结构及功能，易复发、转移，致死率高。
如果能早期发现和治疗病例，则可降低癌症死亡率。早期发现包括两个部分，即：早期诊断和筛查。