A gloved hand holds a blood vial labelled “S. Calcium Level,” illustrating a common laboratory test used in the diagnosis of hyperparathyroidism by measuring elevated calcium concentrations in the blood.

Blood test sample used to assess serum calcium levels, an essential diagnostic step in identifying hyperparathyroidism
A gloved hand holds a blood vial labelled “S. Calcium Level,” illustrating a common laboratory test used in the diagnosis of hyperparathyroidism by measuring elevated calcium concentrations in the blood.