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Anagen effluvium is the pathologic loss of anagen or growth-phase hairs. Classically, it is caused by radiation therapy to the head and systemic chemotherapy, especially with alkylating agents. [1] [2] : 753–4. Anagen effluvium is due to an acute injury to the hair follicles by an endogenous or exogenous cause, resulting in sudden diffuse ...
The three stages of hair growth are the anagen, catagen, and telogen phases. Each strand of hair on the human body is at its own stage of development. Once the cycle is complete, it restarts and a new strand of hair begins to form. The growth rate of hair varies from individual to individual depending on their age, genetic predisposition and a ...
Health threats from cosmic rays are the dangers posed by cosmic rays to astronauts on interplanetary missions or any missions that venture through the Van-Allen Belts or outside the Earth's magnetosphere. [ 1][ 2] They are one of the greatest barriers standing in the way of plans for interplanetary travel by crewed spacecraft, [ 3][ 4][ 5] but ...
Radiation protection, also known as radiological protection, is defined by the International Atomic Energy Agency (IAEA) as "The protection of people from harmful effects of exposure to ionizing radiation, and the means for achieving this". [ 1] Exposure can be from a source of radiation external to the human body or due to internal irradiation ...
A radiation burn is a damage to the skin or other biological tissue and organs as an effect of radiation. The radiation types of greatest concern are thermal radiation, radio frequency energy, ultraviolet light and ionizing radiation . The most common type of radiation burn is a sunburn caused by UV radiation.
Cancer prevention is the practice of taking active measures to decrease the incidence of cancer and mortality. [ 1][ 2] The practice of prevention depends on both individual efforts to improve lifestyle and seek preventive screening, and socioeconomic or public policy related to cancer prevention. [ 3] Globalized cancer prevention is regarded ...
Skin cancers are cancers that arise from the skin. They are due to the development of abnormal cells that have the ability to invade or spread to other parts of the body. [ 10] Skin cancer is the most commonly diagnosed form of cancer in humans. [ 11][ 12][ 13] There are three main types of skin cancers: basal-cell skin cancer (BCC), squamous ...
Cancer of the small intestine. Estrogen receptor-positive breast cancer. Ovarian cancer. Liver and bile duct cancer. Non-HPV-associated oral and pharynx cancer (only in women) Anal cancer (only in ...