Common on-call topics in clinical pathology
Author:
Mikael Häggström [note 1]
Topics with individual articles
Suspected falsely low TSH
If a clinician thinks a TSH result is falsely low (generally signs of hypothyroidism but TSH is not elevated), first check with the lab if their TSH assay is susceptible to high patient biotin levels, and if it is, ask the clinician if the patient takes biotin supplementation, which can explain the low TSH levels.
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