Which symptom is most characteristic of Guillain-Barré syndrome?

Which symptom is most characteristic of Guillain-Barré syndrome?

• A. Progressive ascending weakness with sensory loss and areflexia
• B. Sudden unilateral facial weakness
• C. Chronic joint pain with normal reflexes
• D. Seizures and loss of consciousness

Answer: (C)

The key pattern to recognize is the rapid, symmetric motor weakness that starts in the legs and ascends, with loss of deep tendon reflexes (areflexia). This combination—progressive ascending weakness plus areflexia—is the hallmark of Guillain-Barré syndrome. Sensory symptoms like tingling can occur, but the defining feature is the motor weakness that spreads upward without a focal deficit. In contrast, sudden unilateral facial weakness suggests Bell palsy, not a diffuse ascending neuropathy. Chronic joint pain with normal reflexes points to a musculoskeletal or non-neurologic problem rather than an acute demyelinating process. Seizures and loss of consciousness are not characteristic of Guillain-Barré syndrome and imply a different neurologic issue. So the option describing progressive ascending weakness with sensory changes and areflexia best matches Guillain-Barré syndrome, guiding you toward urgent monitoring of respiratory function and consideration of IVIG or plasmapheresis as part of definitive management.

The key pattern to recognize is the rapid, symmetric motor weakness that starts in the legs and ascends, with loss of deep tendon reflexes (areflexia). This combination—progressive ascending weakness plus areflexia—is the hallmark of Guillain-Barré syndrome. Sensory symptoms like tingling can occur, but the defining feature is the motor weakness that spreads upward without a focal deficit. In contrast, sudden unilateral facial weakness suggests Bell palsy, not a diffuse ascending neuropathy. Chronic joint pain with normal reflexes points to a musculoskeletal or non-neurologic problem rather than an acute demyelinating process. Seizures and loss of consciousness are not characteristic of Guillain-Barré syndrome and imply a different neurologic issue. So the option describing progressive ascending weakness with sensory changes and areflexia best matches Guillain-Barré syndrome, guiding you toward urgent monitoring of respiratory function and consideration of IVIG or plasmapheresis as part of definitive management.