PT - JOURNAL ARTICLE AU - I Z Kovar AU - P Mayne AU - J Wallis TI - Neonatal rickets in one of identical twins AID - 10.1136/adc.57.10.792 DP - 1982 Oct 01 TA - Archives of Disease in Childhood PG - 792--794 VI - 57 IP - 10 4099 - http://adc.bmj.com/content/57/10/792.short 4100 - http://adc.bmj.com/content/57/10/792.full SO - Arch Dis Child1982 Oct 01; 57 AB - We report a case of rickets in one of identical low birthweight twin infants. Plasma 25-hydroxycholecalciferol concentrations were normal in both infants; there was good clinical response to 1-α hydroxycholecalciferol. We suggest that there was a delay in maturation of renal 25-hydroxycholecalciferol-1α hydroxylase enzyme.