When are lab studies indicated in the diagnosis of brachial neuritis (BN)?

Updated: Oct 13, 2020
  • Author: Nigel L Ashworth, MBChB, MSc, FRCPC; Chief Editor: Milton J Klein, DO, MBA  more...
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Laboratory studies are indicated in brachial neuritis only if systemic disease is suspected on clinical grounds. The complete blood count (CBC) and erythrocyte sedimentation rate (ESR) can be used as nonspecific indicators of systemic disease. Antinuclear antibody (ANA) values can be used as a marker for connective-tissue disease. Human immunodeficiency virus (HIV) serology can also be performed.

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