Mathias R S
Department of Pediatrics, University of California Medical Center, San Francisco 94143-0748, USA.
Pediatr Nephrol. 2000 Jun;14(6):489-92. doi: 10.1007/s004670050800.
Calcium homeostasis is altered in patients with Williams syndrome. We report an infant in whom Williams syndrome was diagnosed at 4 weeks who presented with hypercalcemia, hypercalciuria, and medullary nephrocalcinosis. Fluorescence in situ hybridization demonstrated a deletion of the elastin gene on chromosome 7. This infant was treated with a low-calcium/vitamin D-deficient infant formula that resulted in the development of rickets. Replacement of the low-calcium/vitamin D-deficient formula with standard formula led to resolution of the rickets.
