Cancer-Related Dictionary

CA 125, or Cancer Antigen 125, is a protein that is often elevated in the blood of women with ovarian cancer. It's used as a biomarker in medical tests to monitor treatment response or detect recurrence in patients with this type of cancer. It is also used as a diagnostic tool, although it's not specific, since other conditions can also raise CA 125 levels.

CA 19-9, or Carbohydrate Antigen 19-9, is a tumor marker primarily used to monitor treatment response and disease recurrence in pancreatic cancer patients. It can also be elevated in other gastrointestinal cancers and conditions such as cirrhosis and pancreatitis. It's not recommended for cancer screening in asymptomatic individuals due to non-specific findings.

"CAYAs" is an acronym referring to "Children, Adolescents, and Young Adults," particularly in medical studies focusing on cancer patients under the age of 39.

Cachexia is a severe, complex medical condition characterized by extreme weight loss and muscle atrophy, generally observed in individuals suffering from chronic illnesses such as cancer, HIV/AIDS, and heart failure. It's linked with poor response to therapy, decreased quality of life, and increased mortality.

Cancer cachexia is a complex syndrome characterized by severe weight loss, muscle wasting, and loss of appetite, often seen in patients with advanced cancer. It is not simply a result of reduced food intake but involves metabolic changes that make it difficult for the body to maintain weight and muscle mass.

Cancer Stage (I, II, III, IV) refers to the extent of cancer spread in the body, determined by the size and location of the tumor, lymph node involvement, and whether the disease has metastasized. Stage I usually indicates a small tumor confined to the origin site. Stage II and III show larger tumors or greater spread to nearby tissues and nodes. Stage IV symbolizes advanced cancer that has spread to distant parts of the body.

A carcinogen refers to any substance, radionuclide, or radiation that promotes carcinogenesis, the formation of cancer. It works by altering the cellular metabolism or damaging DNA directly in cells, which in turn can induce the development of cancerous growths. Hence, exposure to carcinogens increases cancer risk. Examples include tobacco smoke, asbestos, and certain chemicals.

Carcinoma is a type of cancer that starts in cells making up the skin or the tissue lining organs, such as the liver or kidneys. Unlike sarcomas, carcinomas originate in epithelial cells, including those in glandular tissues. These cancers can affect many parts of the body, often leading to specific symptoms based on their location and stage. Treatment typically involves a combination of surgery, radiation, and chemotherapy.

"Carcinoma in situ" is a medical term referring to a group of abnormal cells that remain in their original location. These cells have the potential to become cancerous, but they haven't spread to surrounding tissues or other parts of the body. It's the earliest stage of cancer, often highly treatable when detected promptly.

The cell cycle is a sequence of events that a cell undergoes, encompassing the period from its formation to its division into two daughter cells. It involves stages such as the growth phase (G1), DNA synthesis (S phase), second growth phase (G2), and mitosis (M phase). This process ensures both growth and repair of tissues across multicellular organisms.

Circulating tumor cells (CTCs) are cancer cells that have detached from a primary tumor and circulate in the bloodstream. These cells have the potential to spread cancer to other parts of the body through a process known as metastasis, making them a significant focus of cancer research and diagnosis.

Clinical endpoints are specific events or outcomes in a clinical study that are used to determine the effect of a treatment. They are measurable and objective, such as survival rates, symptom improvement, or the occurrence of a disease.

Complete remission is a term used in medicine to describe the absence of all signs of cancer in response to treatment. While the disease is undetectable, it does not necessarily mean the cancer is cured, as it may still be present at a microscopic level.

A "Complete response" in a healthcare context typically refers to the total disappearance of all detectable signs and symptoms of disease, often as a result of treatment. It indicates a positive outcome where the individual shows no further evidence of the illness. However, it doesn't guarantee that the disease is permanently cured. It's an important effect reported in clinical trials and cancer treatment.

Computational oncology is a field of medicine that uses computer-based models and simulations to understand cancer development, progression, and treatment. It combines data from various sources, such as genetic information and medical imaging, to create personalized treatment plans and improve patient outcomes.

"Cribriform" is a term used in anatomy and histology, referring to a structure that appears perforated or sieve-like. The term is frequently used to describe a structural pattern characterized by numerous round, small openings - resembling a sieve. This term is often mentioned with the cribriform plate of the ethmoid bone in the skull or in pathological processes like cribriform carcinoma.

A cyst is a sac-like pocket of membranous tissue that contains fluid, air, or other substances. They can form anywhere within the body as a result of various causes such as infections, genetical conditions, or blockages in ducts. Though most cysts are benign, they can sometimes lead to serious complications, and as such, medical advice should be sought when one is discovered.

Cytokines are small proteins released by cells that have a specific effect on the interactions, communication or behavior of cells. They are key players in health and disease, particularly in immune responses. Cytokines aid cell to cell communication in immune responses and stimulate the movement of cells towards sites of inflammation, infection, and trauma.

Cytotoxic granules are specialized structures found in certain immune cells, such as cytotoxic T lymphocytes and natural killer cells. These granules contain proteins that can destroy infected or cancerous cells, helping the immune system to protect the body from disease.