Which rare disorder begins with weakness and tingling in the legs and progresses upward toward the thorax and arms?

Which rare disorder begins with weakness and tingling in the legs and progresses upward toward the thorax and arms?

• A. Multiple sclerosis.
• B. Peripheral neuropathy.
• C. Guillain-Barré syndrome.
• D. Amyotrophic lateral sclerosis.

Answer: (C)

Guillain-Barré syndrome shows an ascending pattern of weakness starting in the legs with tingling (paresthesias) and moving upward toward the trunk and arms. This reflects an autoimmune attack on the peripheral nerves, causing demyelination and impaired nerve conduction. The progression can be rapid and may involve the muscles used for breathing, so early recognition is crucial for airway monitoring and supportive care. Treatments like intravenous immunoglobulin or plasmapheresis help modulate the immune response and can shorten the course. In contrast, multiple sclerosis is a central nervous system disease with episodes of focal neurologic deficits (such as optic or brainstem symptoms) rather than a characteristic ascending weakness; peripheral neuropathies are a broad spectrum of nerve disorders and do not typically present with such rapid, uniform ascension; amyotrophic lateral sclerosis is a progressive motor neuron disease with both upper and lower motor neuron signs and a different onset pattern.

Guillain-Barré syndrome shows an ascending pattern of weakness starting in the legs with tingling (paresthesias) and moving upward toward the trunk and arms. This reflects an autoimmune attack on the peripheral nerves, causing demyelination and impaired nerve conduction. The progression can be rapid and may involve the muscles used for breathing, so early recognition is crucial for airway monitoring and supportive care. Treatments like intravenous immunoglobulin or plasmapheresis help modulate the immune response and can shorten the course.

In contrast, multiple sclerosis is a central nervous system disease with episodes of focal neurologic deficits (such as optic or brainstem symptoms) rather than a characteristic ascending weakness; peripheral neuropathies are a broad spectrum of nerve disorders and do not typically present with such rapid, uniform ascension; amyotrophic lateral sclerosis is a progressive motor neuron disease with both upper and lower motor neuron signs and a different onset pattern.