K Suzuki1, T Kamezaki, K Tsuboi
1Department of Neurosurgery, Tsukuba Memorial Hospital, Ibaraki, Japan.
This case report describes a 78-year-old woman who developed a nontraumatic acute subdural hematoma caused by a dural cavernous angioma. Despite no prior history of trauma, the patient had a rapidly growing angioma that was not visible in imaging two years earlier. The lesion was successfully removed surgically, and the patient was on antiplatelet medication during the period of growth. The authors suggest that nontraumatic subdural hematomas may sometimes be caused by undetected vascular malformations. This case highlights the importance of considering such lesions in the differential diagnosis of acute subdural hematomas.
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Area of Science:
Background:
Nontraumatic subdural hematomas are rare and often linked to vascular anomalies. Prior research has shown that most cases involve trauma or coagulopathy. However, the role of cavernous angiomas in such events remains unclear. This gap motivated the need to investigate alternative sources of bleeding. No prior work had resolved whether nontraumatic ASDH could stem from rapidly growing vascular malformations. Oral antiplatelet use may influence bleeding risk, but its interaction with angioma growth is understudied. The absence of prior imaging detection of such lesions raises diagnostic challenges. Understanding these mechanisms could improve diagnostic approaches. This paper contributes by presenting a case where a previously undetected angioma caused ASDH.
Purpose Of The Study:
This case aimed to document a rare instance where a cavernous angioma led to nontraumatic ASDH. The patient presented with a subdural hematoma despite no history of trauma. The specific problem was to determine the source of bleeding in the absence of typical risk factors. The motivation arose from the lack of prior reports linking rapidly growing dural angiomas to ASDH. The patient’s medical history included antiplatelet use, which may have influenced the outcome. The goal was to highlight the diagnostic and therapeutic implications of such cases. This case adds to the limited literature on nontraumatic ASDH etiology. It underscores the need for careful monitoring of vascular malformations.
The authors propose that a rapidly growing cavernous angioma can rupture, leading to acute subdural hematoma without trauma.
The angioma was detected via MRI and CT scans, which revealed the lesion on the convexity dura mater.
The lack of prior detection suggests the angioma grew rapidly over a two-year period, possibly influenced by antiplatelet medication.
The patient was on oral antiplatelet medication, which may have increased the bleeding risk from the angioma.
Main Methods:
The study involved a clinical case report with neuroimaging and surgical intervention. The patient underwent MRI and CT scans to identify the hematoma and angioma. The angioma was located on the convexity dura mater. Surgical removal of both the hematoma and the angioma was performed. The patient’s medical history was reviewed, including antiplatelet medication use. The absence of prior imaging detection of the angioma was noted. The surgical approach was guided by preoperative imaging findings. Postoperative outcomes were monitored to assess success and complications.
Main Results:
The patient had an acute subdural hematoma caused by a dural cavernous angioma. The angioma was successfully removed along with the hematoma. Prior imaging two years earlier had not detected the angioma. This suggests rapid growth over the intervening period. The patient was on oral antiplatelet medication during this time. The case demonstrates that nontraumatic ASDH can originate from a growing cavernous angioma. The surgical intervention led to successful removal of the lesion. The findings support the possibility of undetected vascular malformations as a cause of ASDH.
Conclusions:
The authors propose that nontraumatic ASDH may arise from a rapidly growing cavernous angioma. This case highlights the diagnostic challenge of undetected vascular malformations. The absence of prior imaging detection suggests the angioma developed quickly. Antiplatelet use may have contributed to the bleeding risk. The successful surgical removal supports this as a viable treatment approach. The case adds to the limited literature on nontraumatic ASDH causes. The findings suggest a need for increased awareness of dural angiomas as a potential source. The authors emphasize the importance of considering vascular malformations in such cases.
The hematoma and angioma were successfully removed, with no further complications reported.
The authors suggest that nontraumatic ASDH may originate from undetected, rapidly growing dural cavernous angiomas.