Abstract
Abstract Rationale: Autonomic dysreflexia is a release phenomenon of spinal sympathetic preganglionic neurons from supraspinal inhibition, possibly of the lower brainstem origin. It is most frequently observed in patients with severe spinal lesions above the mid-thoracic cord. Theoretically, brainstem lesions may cause autonomic dysreflexia; however, such reports are rare. The author reports a case of autonomic dysreflexia restricted to the sacral area that appeared after brainstem lesions due to a traffic accident. Patient concerns: A 36-year-old man suffered from traumatic subarachnoid hemorrhage and hematomas in the lower brainstem. After he became alert and ambulant, he presented with neurological deficits suggestive of right-sided brainstem lesions, which were visualized on magnetic resonance images. He also complained of excessive sweating in the sacral area whenever he had a desire to void. Diagnoses: On the basis of neurological and radiological findings, and results of the thermal sweating test and sweating induced by bladder or rectal distension, his sacral hyperhidrosis was attributed to autonomic dysreflexia. Interventions: Baclofen (15 mg per day) was administered for more than three months, and the sacral hyperhidrosis gradually subsided. Outcomes: After three months, the patient returned home with minor gait disturbances and sacral sweating. Lessons: This may be the first report of excessive sweating due to autonomic dysreflexia caused by traumatic brainstem lesions restricted to the sacral territory. These observations suggest possible somatotopic arrangements, even in the supraspinal inhibitory pathways. Baclofen may be one of the choices for similar cases.
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