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A case of acute subdural hematoma due to ruptured aneurysm detected by postmortem angiography

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Abstract

Acute subdural hematoma (ASDH) is mostly caused by head trauma, but intrinsic causes also exist such as aneurysm rupture. We describe here a case involving a man in his 70s who was found lying on the bedroom floor by his family. CT performed at the hospital showed ASDH and a forensic autopsy was requested. Postmortem cerebral angiography showed dilatation of the bifurcation of the middle cerebral artery, which coincided with the dilated part of the Sylvian fissure. Extravasation of contrast medium into the subdural hematoma from this site was suggestive of a ruptured aneurysm. Autopsy revealed a fleshy hematoma (total weight 110 g) in the right subdural space and findings of brain herniation. As indicated on angiography, a ruptured saccular aneurysm was confirmed at the bifurcation of the middle cerebral artery. Obvious injuries to the head or face could not be detected on either external or internal examination, and intrinsic ASDH due to a ruptured middle cerebral artery aneurysm was determined as the cause of death. One of the key points of forensic diagnosis is the strict differentiation between intrinsic and extrinsic onset for conditions leading to death. Although most subdural hematomas (SDH) are caused by extrinsic factors, forensic pathologists should consider the possibility of intrinsic SDH. In addition, postmortem angiography can be useful for identifying vascular lesions in such cases.

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Authors and Affiliations

  1. Department of Legal Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan

    Go Inokuchi, Yohsuke Makino, Daisuke Yajima, Ayumi Motomura, Fumiko Chiba, Suguru Torimitsu, Yumi Hoshioka & Hirotaro Iwase

  2. Department of Forensic Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan

    Yohsuke Makino, Fumiko Chiba, Suguru Torimitsu & Hirotaro Iwase

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  1. Go Inokuchi
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  2. Yohsuke Makino
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  3. Daisuke Yajima
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  4. Ayumi Motomura
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  5. Fumiko Chiba
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  6. Suguru Torimitsu
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  7. Yumi Hoshioka
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  8. Hirotaro Iwase
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Correspondence to Go Inokuchi.

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Inokuchi, G., Makino, Y., Yajima, D. et al. A case of acute subdural hematoma due to ruptured aneurysm detected by postmortem angiography. Int J Legal Med 130, 441–446 (2016). https://doi.org/10.1007/s00414-015-1262-7

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  • DOI: https://doi.org/10.1007/s00414-015-1262-7

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