7 y/o, Upper Limb Weakness
Case History: 7-year-old male with left upper limb weakness that started two years following a motor vehicle accident.
Case History: 7-year-old male with left upper limb weakness that started two years following a motor vehicle accident.
Symptoms started gradually after the accident, including problems holding objects in his left hand and no curiosity to use left hand.
Figure 1. T2WI coronal.
Figure 2. Fat suppressed T2WI sagittal.
Figure 3. Fat suppressed T2WI axial.
Figure 4. T1WI axial.
Diagnosis: Traumatic pseudomeningocele with nerve root avulsion
There is a loss of power in the left upper extremity with 1/5 grade.
There is inability to identify left-sided nerve roots. Few septae-like structures are noted within the cystic lesions which may represent segments of avulsed nerve roots.
Pseudomeningoceles represent a tear in the meningeal sheath that surrounds the nerve roots and extravasation of CSF into the neighboring tissues.
Most common location is dorsal to thecal sac at lumbar laminectomy site.
Differential diagnosis includes arachnoid cyst.
