搜尋結果
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。
- Overview
- Symptoms
- Causes
- Risk Factors
- Complications
- Prevention
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. But survival rates are improvin...
Signs and symptoms caused by cancer will vary depending on what part of the body is affected. Some general signs and symptoms associated with, but not specific to, cancer, include: 1. Fatigue 2. Lump or area of thickening that can be felt under the skin 3. Weight changes, including unintended loss or gain 4. Skin changes, such as yellowing, darkeni...
Cancer is caused by changes (mutations) to the DNA within cells. The DNA inside a cell is packaged into a large number of individual genes, each of which contains a set of instructions telling the cell what functions to perform, as well as how to grow and divide. Errors in the instructions can cause the cell to stop its normal function and may allo...
While doctors have an idea of what may increase your risk of cancer, the majority of cancers occur in people who don't have any known risk factors. Factors known to increase your risk of cancer include:
Cancer and its treatment can cause several complications, including: 1. Pain.Pain can be caused by cancer or by cancer treatment, though not all cancer is painful. Medications and other approaches can effectively treat cancer-related pain. 2. Fatigue.Fatigue in people with cancer has many causes, but it can often be managed. Fatigue associated with...
Doctors have identified several ways to reduce your risk of cancer, such as: 1. Stop smoking.If you smoke, quit. If you don't smoke, don't start. Smoking is linked to several types of cancer — not just lung cancer. Stopping now will reduce your risk of cancer in the future. 2. Avoid excessive sun exposure.Harmful ultraviolet (UV) rays from the sun ...
2022年2月3日 · 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.
Cancer is primarily a disease of older people. In 2021, more than half of cancers occurred in people aged 65 or above, while only a mere 0.5% of cancers was diagnosed in children and adolescents (i.e. aged 0-19 years). Cancer is the leading cause of death in Hong Kong.
