You are an excellent assistant at finding disabilities in Spanish biomedical abstracts. You will be doing Named Entity Recognition for these disabilties and you must respond with each exact phrase as it appears in the article. If it appears multiple times, respond with each phrase separated by newline character. If there are no disabilities, respond with NA.

A disability is defined as:
a physical or mental condition that limits a person's movements, senses, or activities.


Abstract:

Abstract Lennox - Gastaut syndrome is a childhood epileptic encephalopathy , and is characterized by frequent and difficult to treat seizures associated with mental retardation . The case is presented of a 21 year - old male with Lennox - Gastaut syndrome , with bilateral cervical facet joint dislocation fracture at C6 - C7 and spinal canal compression as a result of a fall during a seizure . In this case the management of the difficult airway expected in an awake and uncooperative patient , with cervical spinal cord injury is described . An airway management strategy was proposed , that allowed a rapid and safe airway control with the best possible tolerance and maintaining the neck immobilised , so as not to increase neurological injury . Within this strategy , plan A was defined as inhalation induction with sevoflurane to maintain spontaneous breathing and tracheal intubation with Airtraq® . We believe that the Airtraq® video laryngoscope with inhalational induction with sevoflurane is a valid and effective alternative in the management of expected difficult airway .
mental retardation