title: Marked hypercalcemia in a patient with hypocalciuric hypercalcemia without a mutation in the calcium-sensing receptor gene.
abstract: A 60-year-old man was admitted to our hospital with marked hypercalcemia. He had no symptoms that might be caused by hypercalcemia. Plasma concentrations of calcium and intact parathyroid hormone were 15.2 mg/dl and 103 pg/ml, respectively. Radiological examinations revealed no abnormal findings. His calcium-creatinine clearance ratio was calculated to be 0.004, thus he was diagnosed as having hypocalciuric hypercalcemia. Familial hypocalciuric hypercalcemia was a plausible diagnosis, however, gene analysis of his calcium-sensing receptor (CaSR) revealed no mutation. The patient was thought to be a case of hypocalciuric hypercalcemia without mutation in the CaSR gene.
authors.affiliation: Department of Internal Medicine, Minoh City Hospital, Minoh, Osaka.
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Hanibuchi
authors.forename: Takao
authors.initials: T
authors.lastname: Maruyama
authors.forename: Masakazu
authors.initials: M
authors.lastname: Menju
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Toyoshima
authors.forename: Takehisa
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Seiji
authors.initials: S
authors.lastname: Fukumoto
authors.forename: Ichiro
authors.initials: I
authors.lastname: Konishi
mesh_terms: D002118:Calcium / Q000652:urine*; D006801:Humans; D006934:Hypercalcemia / Q000097:blood / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009154:Mutation; D044169:Receptors, Calcium-Sensing; D011956:Receptors, Cell Surface / Q000097:blood / Q000235:genetics*
chemical_list: D044169:Receptors, Calcium-Sensing; D011956:Receptors, Cell Surface; D002118:Calcium