vitamin D-dependent rickets, type 2A(redirected from PDDR IIA)
vitamin D-dependent rickets, type 2AA disorder (OMIM:277440) of vitamin D metabolism resulting in severe rickets, hypocalcaemia and secondary hyperparathyroidism. Most patients also have total alopecia.
Defects of VDR, which encodes the nuclear hormone receptor for vitamin D3, cause vitamin D-dependent rickets type 2A.
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