E20.81

Clinical Causes: Surgical removal or damage to the parathyroid glands during thyroid or neck surgery. Autoimmune destruction of the parathyroid glands. Inherited disorders affecting parathyroid gland function. Magnesium deficiency, which can impair PTH secretion. Radiation therapy to the neck area. Certain genetic syndromes affecting calcium regulation. Idiopathic causes, where the reason for impaired PTH secretion is unknown.

Key Symptoms: Muscle cramps, spasms, or tetany (involuntary muscle contractions). Numbness or tingling sensation, especially around the lips, fingers, and toes. Fatigue and weakness. Abdominal discomfort, including nausea and vomiting. Dry skin and brittle nails. Hair loss. Seizures in severe cases of hypocalcemia. Cataracts in long-standing cases. Mood changes or depression.

Diagnosis Path: Serum calcium levels: Typically low in this condition. Serum PTH levels: Usually low or inappropriately normal despite hypocalcemia. Serum phosphorus levels: Often elevated due to decreased PTH effect on phosphorus excretion. Additional tests, such as magnesium levels, to rule out other causes of hypocalcemia. Electrolyte panels and renal function tests to assess overall metabolic status. Imaging studies or genetic testing, if an inherited disorder is suspected.

Treatment Protocols: Oral calcium supplements: To increase serum calcium levels. Active vitamin D analogs (e.g., calcitriol): To enhance calcium absorption from the gut. Magnesium supplementation: If magnesium deficiency contributes to impaired PTH secretion. Monitoring blood calcium and phosphate levels regularly to adjust treatment as needed. In severe or unresponsive cases, synthetic PTH injections may be considered. Patient education on diet, symptoms of hypocalcemia, and when to seek medical help.