Rarely a patient complains of numbness in an extremity associated with exercise. Typically there is an underlying neurological disorder.
Numbness in an upper extremity:
(1) Chiari malformation type I
(2) nerve compression
Numbness in a lower extremity:
(1) epidural venous plexus congestion (venous congestion myelopathy) secondary to a disorder of the lower inferior vena cava (absence, thrombosis, obstruction, other)
(2) myelopathy from other cause
(3) nerve compression
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