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甚麼引致癌症？ 可向醫生提出的疑問 確診後常見問題 癌症迷思 更多資訊. 癌症是細胞生長失控的一種疾病。 我們的身體是由無數細胞所組成的。 身體會自動繁殖新細胞，取代老化細胞或受損的細胞。 這個機制由某些基因負責控制，若然這些基因損壞，令細胞失控地異常增生，在身體裡累積成塊狀，便會成為「腫瘤」。 這些損毀有機會後天形成，亦有小部分的人從父母那裡遺傳到已變異的基因。 腫瘤可分為良性 (Benign) 和惡性 (Malignant) 兩種，惡性的腫瘤俗稱癌。 良性腫瘤的細胞會駐足它們原發的位置，不會擴散到身體其他部分。 惡性腫瘤含有癌細胞。 它最初形成的時候，會守在原發部位上，故稱為「原位癌」。 但若癌細胞得不到治理，它就會入侵周圍的組織及擴散至其他器官去，變成侵略性的癌症。
2022年12月7日 · Cancer refers to any one of a large number of diseases characterized by the development of abnormal cells that divide uncontrollably and have the ability to infiltrate and destroy normal body tissue. Cancer often has the ability to spread throughout your body. Cancer is the second-leading cause of death in the world.
2010年12月3日 · Русский. Español. Key facts. Cancer is a leading cause of death worldwide, accounting for nearly 10 million deaths in 2020, or nearly one in six deaths. The most common cancers are breast, lung, colon and rectum and prostate cancers.
Cancer requires multiple mutations to progress. Cancer is caused by genetic changes leading to uncontrolled cell growth and tumor formation. The basic cause of sporadic (non-familial) cancers is DNA damage and genomic instability. [1] [2] A minority of cancers are due to inherited genetic mutations. [3]
2023年1月17日 · Causes. Risk factors. Types. Early detection. How cancer grows. Treatment. Outlook. Prevention. Takeaway. Cancer occurs when genetic mutations in abnormal cells cause them to divide rapidly....
Overview. Causes. Types. Diagnosis. Treatments. What Causes Cancer? There is no one single cause for cancer. Scientists believe that it is the interaction of many factors together that produces cancer. The factors involved may be genetic, environmental, or constitutional characteristics of the individual.
Causes and Prevention. Cancer prevention is action taken to lower the risk of getting cancer. This can include maintaining a healthy lifestyle, avoiding exposure to known cancer-causing substances, and taking medicines or vaccines that can prevent cancer from developing. Risk Factors for Cancer.
