2021
24-Hydroxylase Deficiency Due to CYP24A1 Sequence Variants: Comparison With Other Vitamin D−mediated Hypercalcemia Disorders
Azer S, Vaughan L, Tebben P, Sas D. 24-Hydroxylase Deficiency Due to CYP24A1 Sequence Variants: Comparison With Other Vitamin D−mediated Hypercalcemia Disorders. Journal Of The Endocrine Society 2021, 5: bvab119. PMID: 34337279, PMCID: PMC8317629, DOI: 10.1210/jendso/bvab119.Peer-Reviewed Original ResearchPositive family historyUrinary calcium:creatinine ratioFamily historyCalcium:creatinine ratioLumbar spine Z-scoreClinical characteristics of patientsRetrospectively reviewed laboratoryIdentified 9 patientsSpine Z-scoreVitamin D toxicityFisher's exact testCharacteristics of patientsLoss-of-function variantsWilcoxon rank sum testRank sum testSerum calciumClinical characteristicsLaboratory findingsCreatinine ratioInactive metabolitesExact testMayo ClinicSymptom onsetGene variantsPatients
2020
Hypercalcemia in Children Using the Ketogenic Diet: A Multicenter Study
Hawkes C, Roy S, Dekelbab B, Frazier B, Grover M, Haidet J, Listman J, Madsen S, Roan M, Rodd C, Sopher A, Tebben P, Levine M. Hypercalcemia in Children Using the Ketogenic Diet: A Multicenter Study. The Journal Of Clinical Endocrinology & Metabolism 2020, 106: e485-e495. PMID: 33124662, PMCID: PMC7823241, DOI: 10.1210/clinem/dgaa759.Peer-Reviewed Original ResearchConceptsAcute hypercalcemiaKetogenic dietLevels of 1,25-dihydroxyvitamin DLow levels of parathyroid hormoneLevels of parathyroid hormoneLow alkaline phosphatase levelMulticenter case seriesImpaired renal functionCohort of patientsResolution of hypercalcemiaReduced osteoblast activityResponse to treatmentAlkaline phosphatase levelsImpaired bone formationRenal impairmentClinical presentationRenal functionParathyroid hormoneCase seriesMulticenter studyClinical characteristicsBone healthHypercalcemiaSkeletal demineralizationFollow-up