1.What Is Cancer?
CANCER, a 6 letter word that makes our world upside down.
Cancer is not just one disease, but a large group of almost 100 diseases. Its two main characteristics are uncontrolled growth of the cells in the human body and the ability of these cells to migrate from the original site and spread to distant sites. If the spread is not controlled, cancer can result in death. 2.How does cancer occur? The body is made up of trillions of living cells. These cells grow, divide, and die in an orderly fashion. This process is a tightly regulated one that is controlled by the DNA machinery within the cell. When a person is a baby or a child or within his or her mother’s womb, cells divide rapidly to allow for growth. After the person
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* Likelihood of recurrence - Benign tumors seldom occur after surgery, whereas malignant tumors recur much more commonly. Surgery to remove a malignant tumor is more difficult than surgery for a benign tumor. Using the fingerlike analogy above, it is much easier to remove a tumor that has a clear fibrous boundary than a tumor that has penetrated nearby tissues with these fingerlike projections. If cells are left over from these fingers, the tumor is more likely to come back. * Systemic effects - Malignant tumors are more likely to have systemic, or total body, effects than benign tumors. Due to the nature of these tumors, symptoms such as fatigue andweight loss are common. Several types of malignant tumors also secrete substances that cause effects on the body beyond those caused by the original tumor. An example of this is the paraneoplastic syndrome caused by some cancers, resulting in a wide array of physical symptoms from hypercalcemia (an elevation of calcium in the blood) to Cushing’s syndrome(which in turn causes symptoms such as rounding of the face, stretch marks and weakened bones). * Death toll - Benign tumors cause around 13,000 deaths per year in the United States. The number of deaths that can be blamed on malignant (cancerous) tumors is over 575,000.
5.Causes of Cancer:
Environmental Risk Factors
Ionizing Radiation
Radiations due to radon gas and prolonged exposure to ultraviolet radiation from the sun can lead to melanoma and other
It is called malignant because not only can it invade into adjacent organs but unfortunately a cancer can spread to other tissues and that can be life threatening. Cancer can actually occur anywhere in the body because there are cells everywhere in the body. In women, one of the most common cancers of course is breast cancer, in men prostate cancer and in men and women, lung cancer and colon cancer are common cancers. It is important to understand that the cancer that occurs in one individual is very different from the cancer that occurs in another. Everyone is different; a lung tumor in one person will be different from a lung tumor in another person. Once a diagnosis of cancer is made, the next obvious question is what do you do? There are several things that are really relevant, for example, the stage of the cancer which is information about where is the cancer? You say it’s a particular kind of cancer? How much cancer is present? Has is spread? Is it in lymph nodes? Has it spread to other organs of the body? Cancer affects everyone in one way or another. Whether it is a family member, loved one or ourselves, cancer has touched our lives.
Cancer is defined by the National Cancer Institute as ?the title given to a group of related diseases. All types of cancer are categorized by uncontrollable growth of cells that metastasize to surrounding tissues.? Cancer can develop at almost any part of the human body and anyone can develop cancer, although risk typically increases with age because most cancers tend to require many years to develop. ?Typically, human cells tend to grow and divide and ultimately form new cells as the body needs them. When an organisms cells grow old or get damaged, the cells die, and new ones replace them. However when cancer
A cancer cell is formed when the cell’s DNA is damaged but not repaired. Instead of the cell dying, like a normal cell, it reproduces new cells which also have the damaged DNA that the original cell had. Factors that can cause a cell to be damaged are mistakes during the reproduction of the cell, environmental reasons, such as smoking or too much sun exposure. The cancer cells form tumors which then invade the tissue of a certain body part, like the breast, lungs, brain, or prostate. Cancer can spread sometimes from body part to body part, but is named from where it starts. For instance, if somebody were to be diagnosed with breast cancer, and developed cancer in their lungs, it would be metastatic lung cancer. Metastasis is how cancer can spread to other body
What is cancer? This is an important question that will help people to understand the severity of this affliction. Cancer occurs from abnormal cell growth in the human body. When this happens tumors may form. Tumors are a mass of cells that continue to expand. These tumors may be benign. This means they will not spread through the body. Though, the tumors may be malignant which means they may spread to other areas of the body in an invasive manner. These malignant tumors have the potential to cause serious complications and even death. It is these tumors that are cancerous.
Cancer is ultimately the result of cells that uncontrollably grow and do not die. Normal cells in the body follow an orderly path of growth, division, and death. Programmed cell death is called apoptosis, and when this process breaks down, cancer begins to form a tumor.
First, we must understand what cancer is and how it forms, cancer is “a malignant and invasive growth or tumor, especially one originating in epithelium, tending to recur after excision and to metastasize to other sites.”1 it is when normal cells mutate and begin to reproduce at such an accelerated rate that body does not have time to get rid of these bad cells and a mass begins to grow creating a problem for the body.
Melanoma is not exact. Exposure to ultraviolet radiation from the sun and tanning beds increases
There are a wide variety of cancer types. They all have several things in common, however. Each cancer starts with cells that become abnormal or cancerous. These cells reproduce and form a mass of cancerous cells. This mass is called a tumor. When the cancerous cells spread, or metastasize, they can impact other tissues, organs, and systems of the body. A second commonality among cancers is that when they are detected early, they are easier to treat and the treatments are more likely to work. In many cases, a cancer that is caught early can be completely destroyed.
Cancer is the disease caused by an uncontrolled division of abnormal cells in a part of the body.
Cancer is the name given to a collection of more than 100 related diseases. It is a genetic disease caused by changes to genes that control the way our cells function (“What is Cancer?” National Cancer Institute). The genetic changes that subsidize cancer tend to affect three chief types of genes- proto-oncogenes, tumor suppressor genes, and DNA repair genes. These are the “drivers” of cancer. Cancer can appear and grow virtually anywhere in the body. Types of cancer are customarily named for the organs or tissues where they form. They can also be described by the types of cell that formed them. Although there are many different kinds of cancer, all cancers start because abnormal cells grow out of control (“What is Cancer?” American Cancer
Cancer refers to a collection of related diseases caused by abnormal, uncontrolled cell division. It can develop and potentially spread to almost any kind of tissue in the body, and each type of cancer is caused by its own set of genetic mutations that influence its behavior.
Cancer is one of the leading causes of death worldwide as it can develop in almost any organ or tissue. Significant advances in understanding the cellular basis of cancer and the underlying biological mechanisms of tumour has been vastly improved in the recent years (Jiang et al. 1994). Cancer is a genetic disease which requires a series of mutation during mitosis to develop, its characteristics can be associated with their ability to grow and divide abnormal cells uncontrollable while in the mean time invade and cause nearby blood vessels to serve its need. Even though many people are affected by cancer today, the abilities which cancer cells have make it hard to find a single effective treatment for cancer. The focus of research now lies
One thing I learned in researching cancer is that in order for cancer to appear in our body it has to avoid being detected by our immune system. The cancer cells have to avoid being detected by the immune system because if they are detected the immune system will try and fight off the abnormality. If your immune system does not detect the abnormality in cells, the cancer cells will grow and reproduce causing cancer to spread rapidly. The cancer cells that are not detected they can create colonies and spread rapidly.
Cancer is one of the leading causes of morbidity and mortality worldwide, with approximately 14 million new cases in 2012.2 The amount of new cases is expected to rise by about 70% over the next 2 decades. Cancer which causes nearly 1 in 6 deaths, is the second leading cause of death globally, and was responsible for 8.8 million deaths in 2015. Approximately 70% of deaths from cancer occur in low- and middle-income countries. In 2012 about 14.1 million new cases of cancer occurred globally (not including skin cancer other than melanoma).3 The most common types of cancer in males are lung cancer, prostate cancer, colorectal cancer and stomach cancer.
The first similarity is that just like malignant tumors, benign tumors can also be quite large. A common mistake patients often make is confuse benign tumors with malignant tumors because of the size. Although malignant tumors are usually larger than benign tumors, that alone does not make the difference. In fact, a benign tumors weighing over a hundred pounds have been removed. An example of a large benign tumor is a 32-year-old man from Vietnam who survived a 12-hour operation in which a massive 198-pound benign tumor from his right leg was removed at France-Vietnam Hospital (FV) on January 5, 2012.2 The second similarity is that both malignant and benign tumors recur locally, to be more specific, the location where the recurrence of the tumor most likely happens. To elaborate further, both benign and malignant tumors have the ability to reappear near or in the same area where the previous tumor was located. For instance, recurrent breast tumors are tumors that have come back in the same breast or chest wall after the treatment for a period of time when the tumor couldn't be detected.3 The third and final similarity is the danger both malignant and benign tumors pose to the health of the patient. Similar