Final answer:
A laboratory finding consistent with Guillain-Barré syndrome (GBS) is an increased protein level in cerebrospinal fluid without an increased cell count, which supports the diagnosis in the appropriate clinical context.
Step-by-step explanation:
A laboratory result consistent with the diagnosis of Guillain-Barré syndrome (GBS) is the increased level of protein in cerebrospinal fluid (CSF) without a corresponding increase in cell count. This finding, known as albuminocytological dissociation, can be observed during a lumbar puncture and CSF analysis
GBS is characterized by the destruction of myelin sheaths around neurons due to an autoimmune reaction, often following infections. Treatment may include therapies like plasmapheresis to remove autoantibodies. Early recognition and intervention are crucial to prevent severity and ensure better outcomes.