Skin cells that lose the ability to grow and divide are called skin cancer. Another name for skin cancer is neoplasia. Skin cancer begins on the outer layer of the skin called the epidermis and is the most common form of cancer in humans. All skin cancers are important but the most commonly seem is the basal cell carcinoma, squamous cell carcinoma, melanoma. These skin cancers happens when the skin starts to grows abnormal skin cells and form a mass called a skin tumor.
Unfortunately, if the cancer is untreated for a longer duration of time, the survival rate dwindles. There are types of this abnormal cell growth that can be potentially more fatal than others. There is an astonishing amount of different cancers to delve in to. The chance of survival depends on the type, as well as the amount of time it has gone untreated. HOW CANCER FORMS To begin, cancer starts to form when abnormal cells grow.
This causes the surviving cells to multiply and create a whole new colony resistant to that specific drug. Symptoms and Treatments. Cancer signs and symptoms are quite different and depend on where is the cancer located, how deep it has spread, and what is size of the tumor is. Some cancers can be either felt or seen through the skin , such as, a lump on the external lining can be an indicator of cancer in those locations. Other cancer types have signs that have a less physical appearance.
Growing out of control and invading other tissues are what makes a cell a cancer cell. Cells become cancer cells because of DNA (deoxyribonucleic acid) damage. DNA is in every cell and it directs all the cell’s actions. In a normal cell, when DNA gets damaged the cell either repairs the damage or the cell dies. In cancer cells, the damaged DNA is not repaired, and the cell doesn’t die like it should.
The Biology of Cancer In this report I will discuss the biology of cancer, including the explanations of what is cancer, what causes it and how it can be prevented. In addition, I will briefly discuss the different ways it is treated. What is cancer? Cancer develops when cells in a part of the body begin to grow out of control. Although there are many kinds of cancer, they all start due to the abnormal cells growing out of control.
Once the tumour expands in growth, more and more mutations occur in subsequent cell divisions and eventually become a dysplasia and instigates invasion into surrounding tissues. In simpler terms, the cancer is spread to other organs and parts of the body. Following this, metastasis occurs resulting in the cancer spreading through the person and/or animals blood stream and/or lymphatic systems and forms other colonies which thus secretes other harmful organelles, and also disrupts normal bodily function, and possibly leading to and eventuating in death.
Carcinoid tumors develop from hormone-producing cells of the intestine. Gastrointestinal stromal tumors develop in the connective tissue and muscle layers in the wall of the colon and rectum. Lymphomas are cancers of immune system cells that typically develop in lymph nodes but may also start in the colon and rectum or other organs. Colorectal cancers are thought to develop slowly over a period of several years. Before a true cancer develops, there usually are precancerous changes in the lining of the colon or rectum.
Cancer is caused by a defect in genes that control cell growth and division. Things like smoking, chewing tobacco, and radiation exposure can cause these defects. Most cancer cells have a defect in the gene called p53. The gene p53 stops the cell cycle until all the chromosomes have been duplicated right, but when it is defective or damaged it makes cells lose their information needed to respond to signals that normally control growth. The cancer I chose is Esophageal Cancer.
As more information is uncovered, there is the instance that environmental factors may play an even bigger role in the development of breast cancer than previously assumed as it influences the genetic make up of an individual. Breast cancer is a form of cancer where the malignant tumor cells start in the tissues of the breast. Similar to all other forms of cancer, it starts in a single cell and is characterized by uncontrolled cell division and growth. These cancer cells are able to metastasize, or spread, to other areas of the body. There can be two types of breast cancer: ductal carcinoma or lobular carcinoma.
In cancer, cells divide and grow uncontrollably, forming malignant tumors, and invading nearby parts of the body. The cancer may also spread to more distant parts of the body through the lymphatic system or bloodstream. A study also showed that tobacco use, alcohol use, unhealthy diet and lack of physical activities are the main cancer risk factors plus ageing factor. Furthermore, in the other part of this analysis explained on how cancer get involved and influence in social, political, economy and environment aspects. In this study also mentioned in detail how cancer change the political system, influence the economics of a country, d... ... middle of paper ... ...ct on another important aspect of marital which is sexuality.