Background: There is a lack of evidence on spinal subarachnoid hematomas because of the rarity of their spontaneous development and difficulty in diagnosis. The aim of this study was to identify the characteristics and outcomes of surgically confirmed acute non-traumatic spinal subarachnoid hematomas from a multicenter surgical database and conduct a systematic review of existing literature.
Methods: Five surgically confirmed cases of acute non-traumatic spinal subarachnoid hematomas were identified from our multicenter database with 22 cases from a systematic review of existing literature.
Results: The mean age of the 27 patients was 59 years. The length of the hematoma was longer than five vertebrae in 70% of the patients, most commonly distributed in the thoracic spine; 63% of all cases were idiopathic, 30% were under anticoagulant therapy, and the remaining 7% presented with coagulation abnormalities. As many as 70% of the patients showed some improvement in neurological symptoms after surgery during a mean follow-up period of 14 months.
Conclusions: This study elucidated the characteristics of acute non-traumatic spinal subarachnoid hematomas in patients who were surgically confirmed. Most patients were middle-aged, complained of back pain, and had the hematoma located in the thoracic spine. Seventy percent of the patients in this study had some improvement in their neurological status, most likely due to surgical decompression and hematoma evacuation.
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