participates_in has_component has component vitamin metabolic process inborn vitamin metabolic disorder abnormal Rare genetic parathyroid disease and phosphocalcic metabolism disorder Hypocalcemic vitamin D-resistant rickets Hereditary vitamin D-resistant rickets VDDR II Vitamin D-resistant rickets type II orphanet ICD10:E83.3 OMIM:277440 VDRR II Hypocalcemic vitamin D-resistant rickets (HVDRR) is a hereditary disorder of vitamin D action characterized by hypocalcemia, severe rickets and in many cases alopecia. Vitamin D-dependent rickets type II OMIM:600785 HVDRR Primary bone dysplasia with defective bone mineralization