• Elena Miravet, Scarlett Sinisterra, Sherri Birchansky, Oscar Papazian, Gerry Tuite, John A I Grossman, and Israel Alfonso.
• Department of Pediatrics, Hospital Clinico San Carlos, Universidad Complutense, Madrid, Spain.
• J. Child Neurol. 2002 Oct 1; 17 (10): 770-2.

AbstractThe association of cervicothoracic extradural arachnoid cysts and obstetric brachial plexus palsy has not previously been reported. We report two patients with this association. The first patient is a 9-month-old boy with left obstetric brachial plexus palsy that developed bilateral leg weakness at 6 months of age owing to compression of the spinal cord by a C6 to T8 left cervicothoracic extradural arachnoid cyst. The second patient is a 3-year-old girl with bilateral brachial plexus palsy and spastic paraparesis who had magnetic resonance imaging at 3 days of age that showed intraspinal cord injury and a cervicothoracic extradural arachnoid cyst compressing the spinal cord. We believe that the association of cervicothoracic epidural arachnoid cysts and obstetric brachial plexus palsy in these patients was causal and recommend that the possibility of a cervicothoracic epidural arachnoid cyst be considered in patients with brachial plexus palsy and evidence of spinal cord injury.

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