Living with a CaSR Disorder
Practical support and information. You’re not alone.
For Newly Diagnosed
A diagnosis of a CaSR disorder can feel overwhelming. Here is what to expect and what to do first.
What to Expect
CaSR disorders are rare, and many GPs will not have encountered them before. You will likely be referred to an endocrinologist (a specialist in hormonal conditions) for ongoing management. Diagnosis may involve blood tests for calcium, PTH, phosphate, magnesium, and urine calcium, as well as genetic testing for CASR mutations.
ADH1 is significantly underdiagnosed — in the largest systematic review, 27% of patients were asymptomatic at diagnosis, suggesting many carriers live with the condition without knowing (Roszko et al., JBMR 2022; n=191).
Key First Steps
- Request a referral to an endocrinologist experienced in calcium disorders
- Ask for genetic testing to confirm the specific CASR mutation
- Get baseline blood work: serum calcium, PTH, phosphate, magnesium, vitamin D, and kidney function
- Get a baseline 24-hour urine calcium measurement
- Request a renal ultrasound to check for nephrocalcinosis
- Keep a symptom diary to track patterns and treatment response
Questions to Ask Your Endocrinologist
- What type of CaSR mutation do I have, and what does it mean?
- What are my target calcium and PTH levels?
- What are the risks of my current treatment, particularly for my kidneys?
- How often should I have blood and urine tests?
- Am I a candidate for any clinical trials or emerging therapies?
- Should my family members be tested?
Managing Daily Life
Living well with a CaSR disorder involves understanding your treatment, nutrition, activity, and symptom management.
Calcium & Vitamin D Supplementation
Take supplements exactly as prescribed. Timing and dosage matter — splitting calcium doses throughout the day improves absorption. Active vitamin D (calcitriol) is typically used rather than standard vitamin D. Never adjust doses without consulting your specialist.
Diet & Nutrition
A balanced diet supports your calcium management. Dairy, leafy greens, and fortified foods contribute dietary calcium. Discuss with your specialist whether dietary calcium intake needs monitoring alongside supplementation. Adequate hydration helps protect kidney health.
Exercise & Physical Activity
Regular exercise supports bone health and mental wellbeing. Weight-bearing activities like walking and resistance training are generally recommended. Discuss your exercise plan with your specialist, particularly if you experience muscle cramps or fatigue.
Managing Symptoms
Common symptoms include muscle cramps, brain fog, fatigue, and tingling (paraesthesia). Track your symptoms alongside calcium levels to identify patterns. Report new or worsening symptoms to your specialist promptly. Magnesium levels should also be monitored as they affect calcium balance.
This information is for educational purposes only and does not replace professional medical advice. Always consult your treating specialist before making changes to your treatment.
Finding Specialist Care
CaSR disorders require specialist management. Here is how to access the right care in Australia.
What Is an Endocrinologist?
An endocrinologist is a medical specialist who manages conditions affecting hormones and glands, including the parathyroid glands and calcium metabolism. For CaSR disorders, endocrinologists with experience in calcium and bone metabolism are ideal.
Accessing Public Services
In Australia, you can access specialist endocrinology services through the public hospital system with a GP referral. Major teaching hospitals in capital cities typically have endocrine units with experience in rare calcium disorders. Wait times vary, so ask your GP to mark the referral as urgent if your calcium levels are significantly abnormal.
Medicare & PBS
Specialist consultations are covered under Medicare with a valid GP referral. Calcitriol and calcium supplements are listed on the Pharmaceutical Benefits Scheme (PBS), reducing out-of-pocket costs. Genetic testing may be available through specialist centres or research programs — ask your endocrinologist about access.
Mental Health & Wellbeing
CaSR disorders affect more than physical health. The psychological impact is significant and well-documented.
The Psychological Impact
The PARADOX study found that among patients with hypoparathyroidism:
- 59% experience anxiety
- 53% report depression
- 72% suffer from brain fog and cognitive difficulty
These are not side effects of worry — they are direct consequences of disrupted calcium signalling in the nervous system and the burden of chronic disease management.
Support Strategies
- Acknowledge that psychological symptoms are a real part of the condition, not “all in your head”
- Connect with other patients through support groups and organisations like CaSR Patient Support
- Discuss cognitive symptoms with your endocrinologist — they may correlate with calcium fluctuations
- Maintain social connections and activities that bring meaning
- Consider mindfulness or relaxation techniques for managing anxiety
When to Seek Help
If anxiety, depression, or cognitive symptoms are affecting your daily life, relationships, or ability to work, speak with your GP. In Australia, a GP can create a Mental Health Care Plan under Medicare, providing access to subsidised sessions with a psychologist (currently up to 10 sessions per calendar year).
Kidney Health
Protecting your kidneys is one of the most important aspects of managing a CaSR disorder.
Why Kidney Health Matters
Conventional calcium and vitamin D supplementation increases the amount of calcium passing through the kidneys. Over time, this significantly raises the risk of kidney complications:
- Nephrocalcinosis (calcium deposits in kidney tissue) — hazard ratio of 6.94 compared to the general population (Underbjerg et al., JBMR 2013)
- Kidney stones — hazard ratio of 1.81 (Underbjerg et al., JBMR 2013)
For patients with ADH1 specifically, 75% on conventional therapy develop at least one complication including nephrocalcinosis (38%), kidney stones (36%), renal impairment, or brain calcifications (Roszko et al., JBMR 2022; n=57).
Prevention & Monitoring
- Regular 24-hour urine calcium tests to monitor calcium excretion
- Periodic renal ultrasound to screen for nephrocalcinosis and kidney stones
- Blood tests for kidney function (eGFR, creatinine) at each specialist review
- Adequate hydration — aim for at least 2–2.5 litres of fluid daily (unless advised otherwise)
- Discuss with your specialist whether thiazide diuretics may help reduce urinary calcium
- Report any flank pain, blood in urine, or changes in urine output promptly
Useful Resources
Trusted organisations and information sources for patients and families.
CaSR Patient Support
The Australian patient organisation for non‑surgical genetic hypoparathyroidism and ADH1 caused by CASR gene mutations.
casr.org.auHealthdirect Australia
Australian Government health information and service finder, including specialist directories and symptom checkers.
healthdirect.gov.auParathyroid UK
UK-based charity supporting patients with parathyroid conditions, including hypoparathyroidism. Offers resources, forums, and advocacy.
parathyroiduk.orgHypoPara Support
International patient community for hypoparathyroidism, providing peer support, information, and connections to specialists.
hypopara.orgClinicalTrials.gov
Search for active and recruiting clinical trials for hypoparathyroidism, ADH1, and calcilytic therapies worldwide.
clinicaltrials.govPubMed
Free access to biomedical and life sciences literature. Search for the latest research on CaSR, ADH1, calcilytics, and hypoparathyroidism.
pubmed.ncbi.nlm.nih.gov