Preface -- Foreward -- Mechanisms Underlying Extracellular Calcium Homeostasis -- Preoperative Parathyroid Imaging For the Endocrine Surgeon -- Primary and secondary hyperparathyroidism Testing and Assays -- Symptomatic Primary Hyperparathyroidism Medical therapy -- Surgical Management of Primary Hyperparathyroidism -- Primary Hyperparathyroidism - Asymptomatic Medical Management -- Surgical Management of Asymptomatic Primary Hyperparathyroidism -- Nonclassic, Extraskeletal Manifestations of Primary Hyperparathyroidism: A Brief Review and Possible Mechanisms -- Secondary Hyperparathyroidism -- Secondary Hyperparathyroidism – Surgical -- Tertiary Hyperparathyroidism Part I: Pathogenesis, Clinical Features and Medical Management -- Surgical Treatment Of Persistent Hyperparathyroidism After Renal Transplantation -- Bone Density and Fracture Risk in Primary Hyperparathyroidism.-Genetic aspects of Hereditary Hyperparathyroidism -- Hypoparathyroidism and Hypocalcemic states -- Molecular Pathogenesis of Primary Hyperparathyroidism -- Cost-effectiveness of Parathyroidectomy for Primary Hyperparathyroidism.