hypocalcemic rickets vitamin D-dependent rickets, type 2 Editor note: ORDO uses dependent-vs-resistant to name types 2 and 1. NCIT seems to confuse type 2 with type 2A HVDRR VDDR2 hypocalcemic vitamin D-resistant rickets hereditary vitamin D-resistant rickets hereditary 1,25 dihydroxyvitamin D-resistant rickets with abnormal Vitamin D receptor vitamin D-dependent rickets, type 2 vitamin D receptor deficiency SCTID:72831007 VDDR II icd11.foundation:2041886796 Orphanet:93160 Hypocalcemic vitamin D-resistant rickets (HVDRR) is a hereditary disorder of vitamin D action characterized by hypocalcemia, severe rickets and in many cases alopecia. VDRR II MEDGEN:760752 vitamin D dependent rickets 2 vitamin D-resistant rickets type II UMLS:C3536983 vitamin D-dependent rickets type II NCIT:C131077 GARD:0016805 NANDO:1200783 MONDO:0019642 vitamin D-dependent rickets