Infant with brachial plexus injury at birth Pediatric Imaging Neurological November 26, 2022October 13, 2022 Sagittal (left) and axial (right) T2 MRI without contrast of the cervical spine shows a left sided extradural CSF collection posterior to the spinal cord from C6 to T1. The diagnosis was avulsion pseudomeningocele with possible avulsion of the C7 nerve root. Related Published November 26, 2022October 13, 2022