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Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. [2] [7] These contrast with benign tumors, which do not spread. [7] Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in bowel movements. [1]
Malignancy. Malignancy (from Latin male 'badly', and -gnus 'born') is the tendency of a medical condition to become progressively worse; the term is most familiar as a characterization of cancer . A malignant tumor contrasts with a non-cancerous benign tumor in that a malignancy is not self-limited in its growth, is capable of invading into ...
Carcinoma is a malignancy that develops from epithelial cells. [1] Specifically, a carcinoma is a cancer that begins in a tissue that lines the inner or outer surfaces of the body, and that arises from cells originating in the endodermal, mesodermal [2] or ectodermal germ layer during embryogenesis. [3]
Oncology is a branch of medicine that deals with the study, treatment, diagnosis, and prevention of cancer. A medical professional who practices oncology is an oncologist. [1] The name's etymological origin is the Greek word ὄγκος ( ónkos ), meaning "tumor", "volume" or "mass". [2] Oncology is concerned with:
Signs and Symptoms. Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. Cancer can be difficult to diagnose because its signs and symptoms are often nonspecific, meaning they may be general phenomena that do not point directly to a specific disease process.
Causes. Radiation, environmental factor, certain infections. A neoplasm ( / ˈniːoʊplæzəm, ˈniːə -/) [1] [2] is a type of abnormal and excessive growth of tissue. The process that occurs to form or produce a neoplasm is called neoplasia.
Many seborrheic keratoses on back of person with Leser–Trélat sign due to colon cancer. Examples of cancers where adenocarcinomas are a common form: esophageal cancer; most cases in the developed world are adenocarcinomas. pancreas; over 80% of pancreatic cancers are ductal adenocarcinomas. prostate cancer is nearly always adenocarcinoma
A carcinogen ( / kɑːrˈsɪnədʒən /) is any agent that promotes the development of cancer. [1] Carcinogens can include synthetic chemicals, naturally occurring substances, physical agents such as ionizing and non-ionizing radiation, and biologic agents such as viruses and bacteria. [2] Most carcinogens act by creating mutations in DNA that ...
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