• World Neurosurg · Aug 2022

    Differences in presentation, radiological features, and outcome in traumatic versus spontaneous acute subdural hematomas - a single-institution population-based study.

    • Djino Khaki, Johan Ljungqvist, Astrid Kirknes, Jiri Bartek, and Alba Corell.
    • Department of Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden.
    • World Neurosurg. 2022 Aug 1; 164: e235-e244.

    BackgroundSpontaneous acute subdural hematoma (sASDH) is a rare neurosurgical condition, with the literature mainly consisting of case reports. In the present study, we compared sASDH with traumatic ASDH (tASDH) to determine the differences in presentation, radiological features, and outcomes in a population-based setting.MethodsAll adult patients (age ≥18 years) who had undergone surgery for ASDH (n = 266), either spontaneous or traumatic, from 2010 to 2020 were included retrospectively. The cohort was divided into 2 groups for comparative analysis: sASDH group (n = 24) versus tASDH group (n = 242).ResultsOf the 266 patients, 24 (9.0%) had presented with sASDH. The sASDH group had a mean age of 66.2 years, and sudden headache was the most common presenting symptom (83.3%). The sASDH group had a higher Glasgow coma scale score at presentation compared with the tASDH group (Glasgow coma scale scores, 10 and 8, respectively; P < 0.01). The outcomes, assessed using the Glasgow outcome scale (GOS), revealed a greater incidence of more favorable outcomes (GOS score 4-5) for the sASDH group (72.7%) than for the tASDH group (41.5%).ConclusionsIn the present population-based study of surgically evacuated ASDH cases, 9% were spontaneous without previous trauma. The outcomes (GOS scores) were significantly more favorable for those with sASDH than for those with tASDH. In one half of the patients with sASDH, arterial bleeding was noted perioperatively, although the preoperative radiological examinations revealed no abnormalities for most patients. However, the lack of sufficient examinations such as computed tomography angiography made it difficult to establish the most common etiology of bleeding in those with sASDH. Further research is warranted to determine the reference standard method for the investigation of sASDH.Copyright © 2022 The Author(s). Published by Elsevier Inc. All rights reserved.

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