Hyperparathyroidism is an abnormally high concentration of parathyroid hormone in the blood, resulting in weakening of the bones through loss of calcium. Many global organizations with varied specializations in hyperparathyroidism came together and this book was produced as a result of their teamwork. The book focuses on giving a general but detailed outlook of the primary/secondary and tertiary hyperparathyroidism, from the biological aspects to hyperparathyroidism in hemodialyzed patients and also, on advanced regime pathways, methods and operational synopsis. The book has been designed to prove beneficial to the medical and paramedical scientists. This book is a way of making knowledge related to hyperparathyroidism accessible to all.