X-ray of the legs in a two-year-old child with rickets
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Osteomalacia (pronounced /ˌɑstioməˈleɪʃiə/),is also referred to as bow-leggedness or rickets - taken from the Greek word ῥάχις (rhákis), meaning "spine". It is a disorder which relates directly to Vitamin D deficiency, which causes a lack of calcium being absorbed. Because calcium is an essential nutrient which aids bone rigidity, the lack of it being absorbed into the body causes fragile or malformed bones, which are unable to support the weight of a growing body. Although osteomalacia can occur in adults, the majority of cases occur in children with poor nutrient intake usually resulting from famine or starvation during early stages of childhood.

Aetiology

Vitamin D is created by the body when it is exposed to UV light, which is more commonly known as being present in sunlight. In 1916, German medical research scientist and pediatrician Kurt Huldschinsky (1883-1940) discovered that exposing patients who had osteomalacia to artificially generated ultra-violet light, or by therapeutically exposing them to sunlight, he was able to yield quicker recovery than other methods, such as supplementation of dairy products within a patient's diet.

Vitamin D3 is produced naturally by the human body on exposure to UVB in sunlight. Vitamin D is also added to milk, milk products, and multi-vitamin pills through a process originally patented by Harry Steenbock. Some people who do not get enough sun exposure, milk products, or green vegetables may also develop the disease. Deficiency of calcium can also cause rickets, particularly in some developing countries where the intake of calcium-rich products such as leafy greens, nuts, and seeds is low.

Hereditary rickets is caused by an inherited disease that interferes with phosphate absorption in the kidney or by Renal tubular acidosis, in which calcium is taken from the bones to counteract acid produced in the kidneys. Rickets can also be caused by certain liver diseases.

Manifestations of disease

Rickets causes bone pain, slowed growth in children, dental problems, muscle loss and increased risk of fractures (easily broken bones). Medical problems seen in children with rickets are

  1. Vitamin D deficiency,
  2. Skeletal deformity,
  3. Growth disturbance,
  4. Hypocalcaemia (low level of calcium in the blood),
  5. Tetany (uncontrolled muscle spasms).

The X-ray, or radiograph, in the article is the classic image of advanced rickets sufferers: bow legs (outward curve of long bone of the legs) and a deformed chest. Changes in the skull also occur causing a distinctive "square headed" appearance. These deformities persist into adult life.

Read more at Wikipedia.org


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Rancor over Rickets - Rickets caused by vitamin D deficiency - Brief Article
From Prepared Foods, 5/1/01

A disease long forgotten has made a resurgence in the U.S. Rickets, an affliction primarily affecting children deficient in vitamin D, softens bones and causes them to bend.

The cause of the recent outbreak, investigators believe, is the result of a reduction in children's consumption of cow's milk. Parents have instead been giving milk substitutes and breast-feeding. Cow's milk, however, has been fortified with vitamin D since the 1930s, which virtually eliminated the problem in the country.

In response to the growing problem, the Center for Disease Control is advising parents to be "more careful" about milk substitutes. This comes as the market for soymilk is booming. The International Dairy Foods Assoc. reports sales for pasteurized soymilk more than doubled their share of the refrigerated milk products market last year. In fact, one of the most popular milk substitutes--Silk soymilk--has seen sales almost triple over the past year. One more interesting tidbit: an eight-ounce glass of fortified milk contains 25% of the daily value of vitamin D recommended; according to its nutritional facts label, Silk contains 30%.

COPYRIGHT 2001 Business News Publishing Co.
COPYRIGHT 2001 Gale Group

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