Rare diseases · Sign or symptom
Hypoparathyroidism
Decreased parathyroid hormone secretion
HP:0000829
What it means
A condition caused by a deficiency of parathyroid hormone characterized by hypocalcemia and hyperphosphatemia.
Rare diseases that can present with this23
Very common80–99%
4Common30–79%
4Sometimes5–29%
10- Addison disease
- Beta-thalassemia major
- Double outlet right ventricle
- Dubowitz syndrome
- Intellectual disability-seizures-hypophosphatasia-ophthalmic-skeletal anomalies syndrome
- Kearns-Sayre syndrome
- Late-onset isolated ACTH deficiency
- Mitochondrial trifunctional protein deficiency
and 2 more in this range
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions, and Orphanet separately records 1 disease where this sign is specifically absent. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Low parathyroid hormone
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.