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Osteoporos Int. 2013 Sep;24(9):2535-8. doi: 10.1007/s00198-013-2351-4. Epub 2013 May 18.

Changes in bone mineral density and body composition of children with well-controlled homocystinuria caused by CBS deficiency.

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  • 1Pediatrics, Korea Cancer Center Hospital, Seoul, South Korea. limjs@kcch.re.kr

Abstract

Homocystinuria due to cystathionine β-synthase (CBS) deficiency is an inherited disorder of the metabolism of methionine. Clinical manifestations include mental retardation, dislocation of the optic lens, vascular lesions, arterial and venous thromboembolism, skeletal abnormalities, and osteoporosis. Most homocystinuria patients diagnosed in adulthood have severe osteoporosis, and homocystinuria is frequently mentioned as a cause of osteoporosis. Good control of plasma homocysteine may prevent or delay some of these complications. However, the effectiveness of bone mineral density (BMD) gain or fracture prevention has not been addressed. Here, we describe changes in BMD and body composition in 5 CBS deficiency patients who were diagnosed at young age and were managed with good metabolic control. We found that the BMD of each region was within the normal range. BMD gain was adequate and the patients had no significant change in skeletal morphology.

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