PRIMARY HYPERPARATHYROIDISM: DIAGNOSTIC DIFFICULTIES AND RARE MANIFESTATION IN THE FORM OF HYPERCALCAEMIC CRISIS.

Primary hyperparathyroidism is an endocrine disorder caused by excessive secretion of parathyroid hormone due to primary pathology of the parathyroid glands. The main manifestations are hypercalcaemia and multiple organ disorders, leading to a reduced quality of life and disability in patients. In rare cases, primary hyperparathyroidism debuts with a hypercalcaemic crisis, a life-threatening condition with high mortality. The article presents a clinical case of primary hyperparathyroidism manifested by a hypercalcaemic crisis in a 58-year-old woman, emphasising the importance of timely diagnosis of the disease.