A multidisciplinary diagnostic and treatment process for low or high blood calcium levels, covering parathyroid hormone, vitamin D, and kidney-bone health.
Indication
- Unexplained fatigue, muscle cramps, or finger tingling (suspected hypocalcemia)
- Recurrent kidney stones and bone pain (suspected primary hyperparathyroidism)
- Osteoporosis or low bone mineral density
- Vitamin D deficiency and related bone mineralization disorders
- Secondary hyperparathyroidism due to chronic kidney disease
- Calcium fluctuations after thyroid or parathyroid surgery
- Family history of parathyroid or endocrine tumors (MEN syndrome)
Preparation
- Come fasting in the morning for blood tests of calcium, phosphorus, albumin, and magnesium
- Blood samples are also taken for PTH and 25-OH vitamin D levels
- If a 24-hour urine collection for calcium and creatinine is needed, the collection container is provided in advance
- Inform the physician about thiazide diuretics, lithium, and vitamin D supplements
- Bring previous reports of bone density measurement (DEXA), neck ultrasound, and scintigraphy
How it's performed
- A detailed history including family history and physical examination is performed; Trousseau and Chvostek signs are evaluated
- Total and ionized calcium, albumin, phosphorus, magnesium, PTH, and 25-OH vitamin D levels are measured
- In suspected hypercalcemia, 24-hour urinary calcium and kidney function are evaluated
- In suspected primary hyperparathyroidism, neck ultrasound and, if needed, sestamibi scintigraphy are planned
- In hypocalcemia, vitamin D, oral or intravenous calcium replacement, and if necessary an active vitamin D analog are started
- In patients with bone involvement, bone mineral density is measured and treatment (bisphosphonates, denosumab, etc.) is considered
Post-procedure
- Calcium, phosphorus, and PTH check every 1-3 months at the start of treatment
- Laboratory follow-up every 6-12 months in stable patients
- Bone density evaluated with DEXA every 1-2 years
- Surgical candidates are reassessed periodically during follow-up
- Patients with concomitant chronic kidney disease are followed jointly with nephrology
Risks
- Hypercalcemia and kidney stones with excessive calcium or vitamin D supplementation
- Vein irritation and changes in heart rhythm during intravenous calcium administration
- Osteonecrosis of the jaw and atypical femur fracture with bisphosphonate use (rare)
- Permanent hypoparathyroidism or vocal cord nerve injury after parathyroid surgery
- Bone loss, fracture risk, and impaired kidney function if treatment is delayed
FAQ
Does vitamin D deficiency only resolve with supplementation?
Most mild deficiencies improve with appropriate vitamin D supplementation and exposure to sunlight. In severe or chronic causes, the underlying disease should also be evaluated.
Does an enlarged parathyroid gland always require surgery?
No. In asymptomatic primary hyperparathyroidism, surgery is planned if certain criteria (age, kidney function, bone density, calcium level) are met; otherwise, follow-up may be chosen.
What are the symptoms of high calcium?
Fatigue, thirst, frequent urination, nausea, constipation, bone pain, and difficulty concentrating may occur. At very high levels, heart rhythm disturbances are possible.
Are osteoporosis and calcium disorders the same?
They are not the same but are closely related. Chronic calcium and vitamin D imbalance can lead to bone loss, and the calcium-PTH axis is important to evaluate when treating osteoporosis.
Related Information
Related Medical Services
Other services in the same specialty or with similar indications you may want to explore.
Osteoporosis monitoring and treatment
Internal Medicine Outpatient Services
Long-term monitoring of bone loss with DEXA, blood tests, and medication therapy.
Vitamin Deficiency Treatment
Internal Medicine Outpatient Services
Vitamin deficiency treatment — evidence-based replacement program for vitamin D, B12 and folic acid deficiencies.
Parathyroid Hormone (PTH)
Medical Biochemistry
Parathyroid hormone (PTH) measurement — assessment of calcium balance, bone health and parathyroid gland function.
Kidney Disease Evaluation
Internal Medicine Outpatient Services
Kidney disease evaluation — early-detection-focused screening and follow-up with creatinine, eGFR and urinalysis.
Geriatric Patient Assessment
Internal Medicine Outpatient Services
Geriatric assessment — a comprehensive review of physical, cognitive, and social health in individuals aged 65 and older.
Hypertension Monitoring and Treatment
Internal Medicine Outpatient Services
Hypertension monitoring and treatment — diagnosis, medication, and lifestyle management of high blood pressure.
Obesity and Metabolic Syndrome Management
Internal Medicine Outpatient Services
Obesity and metabolic syndrome — comprehensive medical evaluation, follow-up, and lifestyle management.
COPD Monitoring and Treatment
Internal Medicine Outpatient Services
COPD (Chronic Obstructive Pulmonary Disease) — diagnosis, monitoring and treatment guided by GOLD staging.