What is the role of blood testing in the diagnosis of Guillain-Barre syndrome (GBS)?

Updated: May 04, 2018
  • Author: Michael T Andary, MD, MS; Chief Editor: Milton J Klein, DO, MBA  more...
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Answer

Guillain-Barré syndrome (GBS) is generally diagnosed on clinical grounds. Basic laboratory studies, such as complete blood counts (CBCs) and metabolic panels, are normal and of limited value in the workup. They are often ordered, however, to exclude other diagnoses and to better assess functional status and prognosis. The ordering of specific tests should be guided by the patient's history and presentation.


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