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rickets
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rickets
The Columbia Encyclopedia, Sixth Edition
rickets or rachitis , bone disease caused by a deficiency of vitamin D or calcium. Essential in regulating calcium and phosphorus absorption by the body, vitamin D can be formed in the skin by ultraviolet rays contained in sunlight; it can also be consumed in such foods as fish oils, eggs, and butter. Since calcium and phosphorus are essential for proper development and hardening of bones, the disease manifests itself in children as softening of bones, abnormal bone growth, and enlargement of cartilage at the ends of long bones. Where bones must support weight, such as the legs and pelvis, the skeleton is likely to become bent or deformed. The result is often knock-knees, bowlegs, and deformities of the chest and pelvis. In temperate climates or the tropics, vitamin-D deficiency usually results from poor diet rather than from lack of exposure to ultraviolet rays of sunlight. Rickets is no longer common in developed countries because milk is readily obtained and is usually fortified with vitamin D; infants commonly receive vitamin D as a supplement. Treatment of rickets is largely preventive, i.e., by early recognition and by including adequate amounts of vitamin D and calcium in the diet.
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The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
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Rickets Rickets was once considered an extremely common disorder of childhood. The term...English word for "twist," or "wrick," and throughout history children with rickets could be identified by their bowed legs and knock knees, which gave them...
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rickets, refractory
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rickets
rickets A childhood condition caused by decalcification of bone, resulting in deformed bones. Rickets is associated with chronic deficiency of vitamin D or calcium and with disorders that cause poor phosphate reabsorption from the kidney nephrons .
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rickets
rickets disease marked by softening of the bones. XVII. of unkn. orig.; assoc. by medical writers with Gr. rhakhîtis RACHITIS , which was adopted as the technical designation. Hence rickety ( -Y1 ) affected with rickets XVII; shaky, tottering XVIII.
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rickets
rickets ( rik -its) n. a disease of childhood in which the bones do not harden due to a deficiency of vitamin D (dietary or resulting from lack of exposure to sunlight). See also osteomalacia . renal r. a type of rickets that is due to impaired kidney function causing bone-forming minerals to be excreted in the ...
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