2013
DOI: 10.4158/ep12158.or
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Falsely Low Parathyroid Hormone Secondary to Biotin Interference: A Case Series

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Cited by 41 publications
(21 citation statements)
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“…The diagnosis of ABD becomes even more challenging in patients taking biotin, which can falsely lower the measured PTH . Of note, our patient was taking biotin when her PTH was >1000 pg/mL and also when her PTH was undetectable.…”
Section: Discussionmentioning
confidence: 90%
“…The diagnosis of ABD becomes even more challenging in patients taking biotin, which can falsely lower the measured PTH . Of note, our patient was taking biotin when her PTH was >1000 pg/mL and also when her PTH was undetectable.…”
Section: Discussionmentioning
confidence: 90%
“…However, this interference is not restricted to thyroid testing. If FT4, TSH and FT3 assays seem particularly prone to this interference, PTH and phosphocalcic examination is another field where these pitfalls are worrying [4,5,7].…”
Section: Discussionmentioning
confidence: 99%
“…A solid phase coated with streptavidin can be conveniently used in different immunoassays. On the other hand, biotin supplement use has expanded over the years, ranging from medically prescribed therapies, to vitamin purchased on the internet [7,8]. For these reasons, we have to pay attention to biotin therapy.…”
Section: Biotin Therapymentioning
confidence: 99%
“…• Meany et al [30] hanno segnalato un caso di un paziente che assumeva 10 mg/die di biotina in cui le basse concentrazioni di PTH misurate con Roche Elecsys 2010 (Monza, Italia) contrastavano con la clinica; rianalizzando il campione con Immulite 2000 (Siemens, Milano, Italia) è stato ottenuto il risultato marcatamente elevato atteso dal quadro clinico (dimostrando, al contempo, che nei pazienti con insufficienza renale l'interferenza dalla biotina può durare fino a 2 settimane); • Waghray A et al [31] hanno confermato la segnalazione qualche anno dopo sulla rivista ufficiale dell'American Association of Clinical Endocrinologists; • Kwok et al [32] hanno studiato nel 2012 il caso di un bambino di 3 anni trattato con 10 mg/die di biotina in cui erano state ripetutamente misurati con Roche Modular E170 basse concentrazioni di TSH e concentrazioni nei limiti di fT4. La ripetizione dei due esami utilizzando Beckman Coulter Access (Cassina de' Pecchi, MI, Italia) aveva presentato un TSH nei limiti e un fT4 aumentato.…”
Section: Il Passatounclassified