Artifactual laboratory abnormalities in patients with paraproteinemia

Vivek Roy

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Paraproteinemia, most often as a result of monoclonal gammopathy of unknown significance (MGUS), is very common and its prevalence is expected to increase with the aging of the population. Paraproteins can be associated with a variety of laboratory abnormalities. These may occur as a result of the underlying disease process that causes paraproteinemia, or may result from the paraproteins affecting a physiologic function in vivo. Laboratory abnormalities may also occur artifactually as a result of interference by the paraproteins with a laboratory test in vitro. A wide variety of laboratory tests may be affected, including several commonly obtained tests such as blood counts, serum sodium, calcium, phosphorous, and high-density lipoprotein (HDL) cholesterol. There is poor correlation between the concentration or type of paraproteins and the likelihood of interference. Awareness of this possibility is important so as to avoid erroneous diagnostic conclusions or unnecessary testing.

Original languageEnglish (US)
Pages (from-to)167-170
Number of pages4
JournalSouthern medical journal
Issue number2
StatePublished - Feb 2009


  • Laboratory abnormalities
  • Monoclonal gammopathy
  • Paraprotein
  • Spurious

ASJC Scopus subject areas

  • Medicine(all)


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