Injudicious use of cranio-spinal imaging in Guillain-Barré syndrome in a low resource country

Background: Many patients being investigated for Guillain-Barré syndrome (GBS) undergo unnecessary neuroimaging. The objective of this study was to determine the proportion of patients with GBS undergoing neuroimaging investigation, and to investigate any association with different GBS variants using the Brighton criteria. Methods: This cross-sectional observational study was conducted in the leading tertiary care hospital in Pakistan; 148 patients being investigated for, and subsequently diagnosed with GBS between January 2017 and March 2020 were enrolled. Participants were asked if they had undergone neuroimaging of the craniospinal axis before or during hospital admission, and the purpose of any computed tomography (CT) scan was investigated. We enquired whether fundoscopy had been performed before lumbar puncture (LP) and determined the level of certainty based on the Brighton criteria. Results: The majority of participants were men (n = 107, 73%), with a mean age of 42.85 ± 18.40 years. The mean waiting time to their first interaction with a neurologist was 5.20 ± 4.01 days, and the demyelinating variant of GBS was more common than the axonal variant (1.6:1). Most patients were diagnosed with level I certainty using the Brighton criteria (n = 113, 76%). Brain and spine magnetic resonance imaging (MRI) were performed ahead of admission in 48 (32%) and 59 (39%) patients, respectively. Brain CT scan was performed in 121 (82%) patients before LP, while 27 (18%) only underwent fundoscopic examination before LP. Conclusion: Clinical examination is fundamental in the diagnosis of GBS. Neuroimaging may be inappropriate and unnecessary, and may detract attention from crucial peripheral neuropathy measures while misusing limited resources.