Cancer-Related Dictionary

Radiation fibrosis syndrome is a condition that occurs when healthy tissue becomes scarred and stiff after exposure to radiation therapy, commonly used in cancer treatment. This can lead to a range of symptoms depending on the area affected, including pain, restricted movement, and functional impairments.

Radiation necrosis is a condition where healthy tissue is damaged and dies as a result of exposure to radiation therapy, typically used in cancer treatment. This can lead to symptoms such as swelling, neurological deficits, and other complications depending on the area affected.

A Radiation Oncologist is a medical professional specialized in the use of radiation therapy to treat various types of cancer. They plan and administer the right dosage of radiation to accurately target the cancerous cells while minimizing damage to surrounding healthy tissues. They collaborate with other physicians in a multidisciplinary team to provide holistic cancer care.

Radiation therapy is a type of cancer treatment that uses high doses of radiation to kill cancer cells and shrink tumors. It can be delivered externally via machines outside the body, or internally, where radioactive material is placed in the body near cancer cells. This treatment aims to damage the DNA of cancer cells, preventing them from growing and dividing.

A radical mastectomy is a surgical procedure aimed at breast cancer treatment. In this operation, the entire breast, chest muscles beneath it, and all the lymph nodes under the arm are removed. It was once the standard treatment, but less extensive surgeries are typically performed today.

Radiotherapy, also known as radiation therapy, is a type of cancer treatment that uses high-energy radiation to destroy cancer cells. It can be delivered externally by a machine that targets the affected area, or internally through the insertion of radioactive material into the body. It's designed to kill cancerous cells while minimizing damage to healthy tissues.

Rare cancers are types of cancer that occur infrequently, affecting a small percentage of the population. They can be challenging to diagnose and treat due to limited research and awareness.

"Receptor status" refers to the presence or absence of particular proteins (receptors) on the surface of cancer cells. These receptors influence how the cancer behaves and responds to treatment. They are typically identified in laboratory tests, helping doctors guide the most effective treatment. Common examples include hormone receptors in breast cancer and human epidermal growth factor receptor-2 in certain types of cancers.

Rectal cancer is a disease in which malignant (cancerous) cells form in the tissues of the rectum. The rectum is the last several inches of the large intestine. It often manifests with symptoms like persistent change in bowel habits, rectal bleeding or blood in stool, persistent abdominal discomfort, and unexplained weight loss. Early diagnosis aids effective treatment.

Recurrence refers to the act of occurring again or repeating. In a health context, it often refers to the return of a disease or condition after a period of improvement or apparent cure. It can also apply to repeated patterns or events in various other disciplines, such as mathematics, engineering, or computer science.

Refractory cancer is a type of cancer that does not respond to treatment. It may continue to grow or spread despite therapy, making it challenging to manage.

Regulatory science is a science that develops the (technical) foundations, processes, methods, and tools to formulate regulatory requirements that ensure the safety, performance, and efficacy of pharmaceuticals and medical devices. It encompasses basic and applied biomedical and social sciences and contributes to the development of regulatory standards and tools.

Remission refers to the state where the signs and symptoms of a disease or condition temporarily or completely disappear. It's often used in context to chronic or severe diseases like cancer, indicating a period where the disease is under control or undetectable. However, remission doesn't necessarily mean a cure, as the disease can return.

Renal angiomyolipoma is a benign tumor of the kidney composed of blood vessels, muscle, and fat. It is usually non-cancerous and often goes undetected unless it causes symptoms or complications.

Renal cancer, also known as kidney cancer, is a disease characterized by the abnormal and uncontrollable growth of cells in the kidneys, vital organs that filter waste from the blood. The most common type is renal cell carcinoma. Symptoms may include blood in the urine, back pain, and fatigue. Late detection or diagnosis could lead to the disease spreading to other organs. Treatment varies depending on the stage and may include surgery, radiation, or targeted therapy.

Residual disease refers to the small amount of cancer cells that may remain in the body after treatment, which can lead to a recurrence if not effectively managed.

Retroperitoneal sarcoma is a rare type of cancer that develops in the connective tissues located in the retroperitoneal space, an area in the back of the abdomen behind the peritoneum, which is the lining of the abdominal cavity. These tumors can grow quite large before causing symptoms, as they have space to expand in the retroperitoneal area.

Risk stratification is a process used in healthcare to categorize patients based on their risk of developing certain diseases or complications. It helps doctors prioritize care and tailor treatments based on the level of risk.