Autoimmune hypoparathyroidism

What it is

From: Orphanet

A rare parathyroid disease and phosphocalcic metabolism anomaly characterized by hypocalcemia, hyperphosphatemia, hypercalciuria, and low serum parathyroid hormone levels, in the presence of autoantibodies against parathyroid tissue. Clinical signs and symptoms are of variable severity and include paresthesia, seizures, laryngospasm, tetany, cardiac dysrhythmias, calcifications of the basal ganglia, and neuropsychological manifestations such as anxiety, depression, confusion, or hallucination. The condition may occur as an isolated disease or in association with other autoimmune diseases.

Reported clinical features and what the terms mean

The following findings are associated with this condition in Orphanet. They are not a checklist for diagnosing yourself, and they do not all occur in every affected person. Some are examination, imaging or laboratory findings that cannot be recognised at home.

The frequency labels describe how often a finding was reported among people with the condition in the source. They do not give the chance that a person with that symptom has the condition. Definitions below reproduce HPO terminology; they explain the term, not the likely severity in an individual.

Autoimmune hypoparathyroidism · Obligate (100%)

A type of hypoparathyroidism with circulating antiparathyroid or anti-calcium sensing receptor antibodies indicative of autoimmunity.

Hyperphosphatemia · Very frequent (99-80%)

The concentration of phosphate ion in the blood circulation is above the upper limit of normal.

Hypocalcemia · Very frequent (99-80%)

The concentration of calcium in the blood circulation is below the lower limit of normal.

Autoimmune antibody positivity · Frequent (79-30%)

The presence of an antibody in the blood circulation that is directed against the organism's own cells or tissues.

Cataract · Frequent (79-30%)

A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule.

Chvostek sign · Frequent (79-30%)

A contraction of ipsilateral facial muscles subsequent to percussion over the facial nerve.

Decreased circulating parathyroid hormone level · Frequent (79-30%)

An abnormally decreased concentration of parathyroid hormone.

Hypoesthesia · Frequent (79-30%)

Decreased ability to perceive touch.

Paresthesia · Frequent (79-30%)

Abnormal sensations such as tingling, pricking, or numbness of the skin with no apparent physical cause.

Trousseau sign · Frequent (79-30%)

After inflating a blood pressure cuff from 10 mm Hg to 20 mm Hg over the patient's systolic blood pressure, the Trousseau sign is considered positive if carpal spasm develops, with flexion of the thumb and adduction of the finger within 3 minutes. However, this can be painful, so the time should be noted, and the cuff should be deflated once the test is positive.

Hypercalciuria · Frequent (79-30%)

Abdominal symptom · Occasional (29-5%)

A subjective manifestation of disease localized to the abdomen.

Abnormality of extrapyramidal motor function · Occasional (29-5%)

A neurological condition related to lesions of the basal ganglia leading to typical abnormalities including akinesia (inability to initiate changes in activity and perform volitional movements rapidly and easily), muscular rigidity (continuous contraction of muscles with constant resistance to passive movement), chorea (widespread arrhythmic movements of a forcible, rapid, jerky, and restless nature), athetosis (inability to sustain the muscles of the fingers, toes, or other group of muscles in a fixed position), and akathisia (inability to remain motionless).

Alopecia · Occasional (29-5%)

A noncongenital process of hair loss, which may progress to partial or complete baldness.

Other findings in the same source

From: Orphanet

Additional reported features include Anxiety (Occasional (29-5%)); Autoimmunity (Occasional (29-5%)); Basal ganglia calcification (Occasional (29-5%)); Calcium nephrolithiasis (Occasional (29-5%)); Chest pain (Occasional (29-5%)); Chronic mucocutaneous candidiasis (Occasional (29-5%)); Confusion (Occasional (29-5%)); Conjunctivitis (Occasional (29-5%)); Depression (Occasional (29-5%)); Dyspnea (Occasional (29-5%)). This is a selected summary, not a complete description of the condition.

When it may begin

From: Orphanet

Adolescent; Adult; Childhood

Inheritance in the source

From: Orphanet

Not applicable

Which doctor should you see?

The suggested department for discussing Autoimmune hypoparathyroidism is Endocrinology, with a endocrinologist as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• Which hormone or metabolic finding is important in this case?
• How should test timing and current medicines be taken into account?
• What follow-up would show whether the care plan is working?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Autoimmune hypoparathyroidism. That gap does not mean that treatment is unavailable. A clinician needs to establish the diagnosis and review current guidance before recommending medicines, procedures, rehabilitation or other support.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.