Rupture of a small middle cerebral artery aneurysm into middle fossa arachnoid cyst presenting as a chronic subdural haematoma

Abstract

The rupture of an aneurysm into an arachnoid cyst and subdural space is unusual. A 25-year-old man was admitted 2 weeks after having undergone a burr hole drainage for a chronic subdural haematoma elsewhere. An angiogram revealed a small aneurysm at the bifurcation of the middle cerebral artery. The aneurysm was clipped and the cyst communicated with the basal cisterns. To the best of our knowledge, this is the first report of an association of an aneurysm of the middle cerebral artery with an arachnoid cyst presenting as a chronic subdural haematoma.

Spontaneous chronic subdural hematoma associated with arachnoid cyst in a child: A case report and critical review of the literature

“…[44] Reviewing the literature, we found 57 reports published during 1976-2019, with a total number of 183 cases of CSDH in association with AC with age ranging between 3 years and 58 years [Table 1]. [1,7,8,[11][12][13][14][15][16][17][20][21][22]25,26,29,30,33,34,36,39,40,42,45,46,48,[54][55][56][57][58][59][60]63,64,[66][67][68][69][70][71] ere were 31 single case reports, 12 publications reporting on 2-3 patients, and 14 case series reporting on 5-16 patients. ere are some data to support that the coexistence of CSDH and AC is not incidental, and two pathogenic mechanisms were proposed to explain such association.…”

Arachnoid cyst with ipsilateral subdural hematoma in an adolescent - causative or coincidental: Case report and review of literature

“…[6] have described a patient (25-year-old male) with MCA bifurcation aneurysm that bled into an AC and leaked into the subdural space causing SDH.…”