Unusual case of depressed fracture of the posterior cranial fossa associated with the syndrome of acute central cervical spinal cord injury
1986
: Linear fractures through the occipital bone are common, whereas depressed fractures in the posterior cranial fossa are rare because the occipital bone is protected by the surrounding thick muscles. The authors describe an unusual case of depressed fracture localized in the posterior cranial fossa associated with the syndrome of acute central cervical spinal cord injury. A 50-year-old female struck her face against the table and fell backward, while drunk, resulting in the bruise over the occipital region. Three days after injury she was transferred to our hospital because of progressive disturbance of consciousness, brain stem dysfunction and tetraplegia. Neurological examination on admission showed that she was drowsy, had tetraplegia and could not speak. However, she could obey commands only by moving her eyes and the ocular movements were normal in all directions except for horizontal nystagmus. Plain skull x-ray revealed a conspicuously depressed fracture in the posterior cranial fossa, but cervical spine x-ray showed neither fracture nor dislocation. Immediately suboccipital craniectomy was done and there were a thin subdural hematoma on the cerebellar surface, cerebellar contusion, and subarachnoid hemorrhage around the cisterna magna. Soon after operation impaired consciousness and paraplegia were improved, but recovery of both arms was delayed. Five months after injury, she still had left IX, X and XI nerve paresis, bilateral arm weakness, dysarthria, swallowing disturbance and bilateral sensory disturbance below C4 level. These findings indicated that she had sustained brain stem and cerebellar compression by the depressed fracture and also had suffered an acute central cervical spinal cord injury.
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