Hyperparathyroidism is a disease caused by over secretion of parathyroid hormone (PTH). Inappropriately elevated parathyroid hormone level, may cause hypercalcemia. Hyperparathyroidism is classified as primary, secondary and tertiary.
What is Primary Hyperparathyroidism?
Primary hyperparathyroidism is a condition caused by over secretion of PTH.
What is Parathyroid Hyperplasia?
Parathyroid hyperplasia is an increase of the number of cells in one or more parathyroid glands. Parathyroid hyperplasia may be diffuse or nodular.
What is a Parathyroid Adenoma?
A parathyroid adenoma is the main cause of primary hyperparathyroidism, present in about 90% of the primary-form cases.
What is Parathyroid Carcinoma?
A parathyroid carcinoma is a malignant parathyroid lesions.
What is Secondary Hyperparathyroidism?
Secondary hyperparathyroidism is a condition in which parathyroid levels are high due to tissues not responding to parathyroid hormone or malignancies.
Conditions that cause secondary hyperparathyroidism include:
- Severe calcium deficiency
- Severe vitamin D deficiency
- Chronic kidney failure
What is Tertiary Hyperparathyroidism?
Tertiary hyperparathyroidism is an excessive production of parathyroid hormone that does not respond to feedback controls.