Skip to Content
Medical Term:


Pronunciation: pre'al-byu'min


  1. A protein component of plasma having a molecular weight of about 55,000 and containing 1.3% carbohydrate; estimated plasma concentration is 0.3 g per 100 mL; abnormal levels of prealbumin are found in cases of familial amyloidosis.
  2. The protein-containing zone observed in zone electrophoresis of serum that migrates more rapidly than serum albumin.

Synonym(s): transthyretin

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.