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vitiligo

(Encyclopedia)vitiligo, condition that causes irregular patches of skin to lose pigment and turn white. The exact cause is unknown, but it occurs when the immune system attacks and destroys melanocytes, the cells t...

Adler, Alfred

(Encyclopedia)Adler, Alfred ädˈlər [key], 1870–1937, Austrian psychologist, founder of the school of individual psychology. Although one of Sigmund Freud's earlier associates, he rejected the Freudian emphasis...

lymphoma, non-Hodgkin's

(Encyclopedia)lymphoma, non-Hodgkin's, any cancer of the lymphoid tissue (see lymphatic system) in which the Reed-Sternberg cells characteristic of Hodgkin's disease (the other category of lymphoma) are not present...

breast cancer

(Encyclopedia)breast cancer, cancer that originates in the breast. Breast cancer is the second leading cause of cancer death in women (following lung cancer). Although the vast majority of the cases occur in women,...

Kellogg, John Harvey

(Encyclopedia)Kellogg, John Harvey, 1852–1943, American physician, health-food advocate, and breakfast cereal developer, b. Tyrone, N.Y., grad. New York Univ. (M.D., 1875) and continued his medical studies in Eur...

phenylketonuria

(Encyclopedia)phenylketonuria fĕnˌəlkētˌəno͝orˈēə [key] (PKU), inherited metabolic disorder caused by a deficiency in a specific enzyme (phenylalanine hydroxylase). The absence of this enzyme, a recessive...

sports medicine

(Encyclopedia)sports medicine, branch of medicine concerned with physical fitness and with the treatment and prevention of injuries and other disorders related to sports. Knee, leg, back, and shoulder injuries; sti...

speech defect

(Encyclopedia)speech defect, any condition that interferes with the mental formation of words or their physical production. Speech defects in children generally become apparent in the early school years. Speech pro...

Freud, Anna

(Encyclopedia)Freud, Anna froid [key], 1895–1982, British psychoanalyst, b. Vienna, Austria. Continuing the work of her father, Sigmund Freud, she was a pioneer in the psychoanalysis of children. She received her...

Crofton, Sir John Wenman

(Encyclopedia)Crofton, Sir John Wenman, 1912–2009, British physician, b. Dublin. He served in the British medical corps during World War II and during 1946–52 was part of a research team studying the effects of...