to investigate the role of vitamin d metabolites in the pathogenesis of pseudohypoparathyroidism , we studied an elderly man with a unique variant of the disease , which was characterized by hypocalcemia , elevated serum parathyroid hormone ( 513 +/- 13 pg per milliliter , mean +/- s.e.m. , normal , less than 450 ) but normal renal responses ( phosphate and cyclic amp ) to exogenous parathyroid extract .
C0020598
hypocalcemia
C0030520
parathyroid