Sources of ionizing radiation include medical imaging and radon gas.
What are the Characteristics of Cancer Differentiation and Anaplasia: Differentiation defined as the extent to which the cancer cells resemble their precursors morphologically and functionally.
The differentiation and anaplasia only occur in parenchymal tissues and do not occur in Stroma. The Stroma is crucial for the blood supply for cancer cells but it has no role in differentiation in between beningn cancer and malignant cancer cells.
The stromal tissue however determines the consistency of the cancer. Stroma cancer has hard and dense abundant Fibrous Stroma so called Scirrhous Stroma.
Beningn Cancers are composed of well differentiated cells that resemble with normal cell and mitosis is rare. Malignant cell have wide range of parenchymal differentiation from well differentiation to completely un-differentiation. More the differentiation, more capability to perform normal functions.
Malignant Cancers are composed of undifferentiated cells that are called as Anaplasia. Anaplasia is Hallmark of malignancy.
The cell shows following features: Mitosis are numerous and atypical, Nucleus are hyperchromic, Ratio of nucleus to cytoplasm became equal 1: Dyslasia is a term referred to loss in the uniformity of individual cells in their architectural orientation. When dysplastic cells involve the entire thickness of epithelial tissue it referred as carcinoma in situ which is pre invasive stage of cancer.
Dysplastic changes are often found adjacent to the foci of malignant cells but dysplasia does not always progress to cancer. Rate Of Growth of Cancer: Most cancers grow more rapidly eventually spreading to the surrounding tissues and metastasize and thus causing death.
Beningn tumor grows slower except leiomyoma of uterus which grow faster due to increasing level of estrogen. The rate of growth of malignant cancer depends upon the level of differentiation, like more rapidly growing cancers are poorly differentiated. Rapidly growing cancers often contain central area of ischemic necrosis because the cancer blood supply, derived from host is not enough to keep pace to the oxygent need of expanding mass of cancer cells.
A clinically detectable cancer contains a heterogenous population of cells, which originated from single clonal cell. Local Invasion of Cancer: A beningn tumor remain localized at its site of origin, it does not invade, infiltrate, or metastasize to distant sites as do malignant cancer, The beningn tumor are encapsulated.
The capsule is derived from the stroma of host tissue. Malignant Cancer grow by progressive infiltration, invasion, destruction and penetration of the surrounding tissue. These are non capsulated. Local invasion is the most important features that distinguish in between beningn and malignant cancers.
Metastasis is defined as the secondary implant discontinuous with the primary cancer, in remote tissues. The properties of invasiveness and even more identify a neoplasm as malignant as any of other attribute to cancer.
Not every cancer metastasize, there are few exceptions of basal cell carcinoma of skin and cancers of central nervous system which rarely metastasize.
Characteristics of cancer and prevention of malignant diseases. Heredity and environment. The many causes of cancer include intrinsic factors, such as familial adenomatous polyposis, in which all patients develop colon cancer by age The most common types of cancer that occur sporadically, such as cancers of the breast, ovary, . Most genetic diseases are the direct result of a mutation in one gene. However, one of the most difficult problems ahead is to further elucidate how genes contribute to diseases that have a complex pattern of inheritance, such as in the cases of diabetes, asthma, cancer, and mental illness. Cancer is a class of diseases characterized by out-of-control cell growth. There are over different types of cancer, and each is classified by .
Generally, the more anaplastic cells the larger the cancer mass, more will be metastasize. But here is also few exceptions like some small cancers may also metastasize, while some large cancer cannot metastasize. Malignant cancers are disseminated through 3ways: This spreading occur when cancer cells invade the body cavities.
Cancer of ovary particularly disseminate through this pathway. Lymphatic spread is more characteristic of carcinoma. The pattern of lymph node involvement depends principally on the side of primary cancer and the pathway of lymphatic drainage of the site.
Some time the cancer cell traverse the lymphatic channels within the immediately proximate nodes to be trapped in subsequent lymph nodes producing skip lesion. A sentinel lymph node is first lymph node in a regional lymphatic basin that receives lymph flow from primary cancer.
Hematogenous Spread is the most feared pathway of the cancer. It is best for sarcoma cancer.Choose a cancer type from the list below to get detailed information.
If you don't see your type listed, it might be covered under a different name. Use the search icon in the menu at the top of the page, or contact us for help on live chat or by calling Cancer, also called malignancy, is an abnormal growth of cells.
There are more than types of cancer, including breast cancer, skin cancer, lung cancer, colon cancer, prostate cancer, and lymphoma. Characteristics of Infectious Disease. Learning Objectives. A specific group of signs and symptoms characteristic of a particular disease is called a syndrome.
Many syndromes are named using a nomenclature based on signs and symptoms or the location of the disease.
to describe and categorize various types of disease. An infectious. A Group of Diseases. Although cancer is often referred to as a single condition, it actually consists of more than different diseases.
These diseases are characterized by uncontrolled growth and spread of abnormal cells.
Cancer can arise in many sites and behave differently depending on its organ of origin. Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body.
These contrast with benign tumors, which do not spread to other parts of the body.
Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss and a change in bowel movements. While these symptoms may indicate cancer, they.
|Skip links||A dividing lung cancer cell. Cancer can start almost anywhere in the human body, which is made up of trillions of cells.|
Cancer, also called malignancy, is an abnormal growth of cells. There are more than types of cancer, including breast cancer, skin cancer, lung .