33 year female with abrupt onset bl lower limbs weakness planter mute

33 year female with abrupt onset bl lower limbs weakness planter mute bl power reduced tone 8ncreased and also resolving what can be the cause

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Guillain-Barre syndrome AND acute weakness

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acute bilateral leg weakness emergency red flags cauda equina transverse myelitis Guillain Barre

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Abrupt bilateral leg weakness is a neurologic emergency and needs urgent in-person assessment, even if it is partly resolving.

With reduced power plus increased tone, an upper motor neuron / spinal cord process is more concerning than a peripheral neuropathy. A mute plantar response is not diagnostic and can occur early in an acute cord lesion.

Important possibilities include:

Acute spinal cord lesion: compression from a large disc, epidural hematoma/abscess, tumor, etc.
Spinal cord infarction (ischemia): especially if onset was truly sudden, often with back pain and a sensory level.
Acute transverse myelitis / inflammatory myelopathy: can cause bilateral weakness, sensory changes and bladder dysfunction. Early on, tone and reflexes may be reduced because of spinal shock, then become increased/brisk.
Brain lesion such as bilateral ACA-territory stroke, less commonly, especially if there are speech, facial, arm, or cognitive symptoms.
Guillain-Barre syndrome is less consistent if tone is increased. It usually causes flaccid weakness with reduced or absent deep-tendon reflexes.

Immediate red flags: urinary retention or incontinence, constipation/bowel incontinence, saddle numbness, a clear sensory level on the trunk, severe back pain, fever, rapidly worsening weakness, breathing difficulty, or inability to walk. Any of these requires emergency-department care now.

Typical urgent work-up: complete neurologic examination including reflexes and sensory level, bladder scan, serum glucose/electrolytes, and urgent MRI of the entire relevant spine with contrast to exclude compression, infarction, and myelitis. Brain imaging may also be needed depending on the examination.

The abrupt onset makes spinal cord ischemia or acute cord compression particularly important to exclude first. Do not label this as GBS or “functional” until cord compression and other central causes have been assessed.

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