Vitamin D-dependent rickets, type 1

MONDO:0009924

Hypocalcemic vitamin D-dependent rickets (VDDR-I) is an early-onset hereditary vitamin D metabolism disorder characterized by severe hypocalcemia leading to osteomalacia and rachitic bone deformations, and moderate hypophosphatemia.

Also known as: 1 Alpha-hydroxylase deficiency, 1-alpha-hydroxylase deficiency, PDDRI, VDDI, VDDR-I, VDDR1, hypocalcemic vitamin D-dependent rickets, pseudo vitamin-D deficient rickets

14 clinical trials for this condition and its sub-types, 0 tagged with Vitamin D-dependent rickets, type 1 itself.

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Where it sits in the disease tree

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↑ Hypocalcemic rickets (3) ↑ Vitamin D-dependent rickets (3)

Sub-types of Vitamin D-dependent rickets, type 1

Vitamin D hydroxylation-deficient rickets, type 1B 3 trials
Vitamin D-dependent rickets, type 1A 0 trials

Including sub-types (14) Tagged with Vitamin D-dependent rickets, type 1 (0)

Trials to join now! 4 Not yet recruiting 4 Not yet finished but already full! 1 Completed 5

Real food tube feeds: a kinder option for kids?

Symptom relief Ongoing

This study looks at how well children aged 1 to 16 tolerate and accept new nutritional feeds made from real food ingredients. The feeds are given through a tube or as a drink. Researchers will track stomach issues like pain, bloating, and nausea over 28 days. The goal is to see i…

Sponsor: Nutricia UK Ltd • Aim: Symptom relief

Last updated Jun 27, 2026 12:08 UTC

Vitamin D-dependent rickets, type 1

Where it sits in the disease tree

Real food tube feeds: a kinder option for kids?