We report a new kindred of hereditary hypophosphatemic rickets with hyperca
lciuria, The symptomatic child and several relatives had increased renal ph
osphate clearance leading to hypophosphatemia, hyperabsorptive hypercalciur
ia, low PTH and increased 1,25-(OH)(2)D serum level. However, association w
ith vitamin D deficiency and normal urinary excretion of cyclic AMP might s
uggest another tubular defect in phosphate transport. Copyright (C) 2001 S.
Karger AG, Basel.