Underproduction of parathyroid hormone despite low calcium. Much rarer than hyperparathyroidism
Primary
Causes
- DiGeorge syndrome
- Autosomal dominant hypoparathyoidism
- Pseudohypoparathyroidism Type 1A - bones + kidney don’t respond to parathyroid hormones - defective parathyroid hormone receptor
- Surgical damage to the gland after thyroidectomy
Symptoms of hypocalcemia and Hyperphosphatemia (table)
Secondary
Depression due to chronic Hypocalcaemia, would likely accompanied by signs of Hypocalcaemia