title: Poor renal uptake of 99mtechnetium-dimercaptosuccinic acid and near-normal 99mtechnetium-mercaptoacetyltriglycine renogram in nephronophthisis.
abstract: Four patients with the clinical diagnosis of nephronophthisis are presented, all having a very poor renal uptake of 99mtechnetium-dimercaptosuccinic acid (99mTc-DMSA) but clearly visualized kidneys on early images with 99mtechnetium-mercaptoacetyltriglycine and a normal or almost normal renogram. There was no difference between a young patient in an early stage of the disease and the other three patients with more advanced renal disease. In contrast, a patient with tubulointerstitial nephritis with uveitis had considerably better renal uptake of 99mTc-DMSA despite impaired renal function. We suggest that the specific tubular function defect in nephronophthisis might be the cause of the poor uptake of 99mTc-DMSA. We also recommend the method to support the clinical suspicion of nephronophthisis, even in the early stages of the disease.
authors.affiliation: Department of Pediatrics, County Hospital Ryhov, Jönköping, Sweden.
authors.forename: H
authors.initials: H
authors.lastname: Hecht
authors.forename: J
authors.initials: J
authors.lastname: Ohlsson
authors.forename: S A
authors.initials: SA
authors.lastname: Starck
mesh_terms: D000293:Adolescent; D000328:Adult; D001706:Biopsy; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging* / Q000378:metabolism; D008297:Male; D009395:Nephritis, Interstitial / Q000000981:diagnostic imaging* / Q000378:metabolism; D015609:Organotechnetium Compounds / Q000493:pharmacokinetics*; D011866:Radioisotope Renography; D004113:Succimer / Q000493:pharmacokinetics*; D019783:Technetium Tc 99m Dimercaptosuccinic Acid; D017263:Technetium Tc 99m Mertiatide / Q000493:pharmacokinetics*
chemical_list: D015609:Organotechnetium Compounds; D017263:Technetium Tc 99m Mertiatide; D019783:Technetium Tc 99m Dimercaptosuccinic Acid; D004113:Succimer