A Form of Dysplasia or a Fortuitous Association? A Cerebral Aneurysm Inside an Arachnoid Cyst

Zanini, Marco Antônio; Faleiros, Antonio Tadeu de Souza; Rondinelli, Gilberto; Gabarra, Roberto Colichio; Resende, Luiz Antônio de Lima

doi:10.1227/01.neu.0000290917.70717.39

Cited by 8 publications

(6 citation statements)

References 29 publications

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“…1 Other hypotheses are: 1-dysgenesis embryo in the formation of the arachnoid, secondary to a primary disorder of the mesenchyme adjacent to the neural tube; 2-agenesis, located atrophy or hypoplasia of the brain resulting in the secondary expansion of the CSF space; 3located disorder secondary to infectious/inflammatory process, traumatic or hemorrhagic. 5 Most imaging studies findings are incidental due to the asymptomatic clinic nature of the arachnoid cysts. The risk of bleeding does not exceed 0.04% per annum.…”

Section: Discussionmentioning

confidence: 99%

Arachnoid Cyst with a Non-traumatic Acute Subdural Hematoma in an Eleven-year-old Patient

2016

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A non-traumatic intra-cystic hemorrhage in an arachnoid cyst is a rare event, with few cases reported in the literature. We present a case of an eleven-year-old boy patient, which presented a spontaneous acute subdural hematoma and intra-cystic hemorrhage after a strong headache episode. The results were evidenced by a computed tomography (CT) scan and surgical findings. We perform a brief literature review on the arachnoid cyst and its suggested treatments. In our case, the patient underwent a surgical treatment with a complete resolution of the case.

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Section: Discussionmentioning

confidence: 99%

Arachnoid Cyst with a Non-traumatic Acute Subdural Hematoma in an Eleven-year-old Patient

2016

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“…[2][3][4][5][6]9,10) Only eight cases have been reported including the present case (Table 1). Lesions were located on the left in six cases.…”

Section: Discussionmentioning

confidence: 99%

Intracystic Hematoma of Middle Fossa Arachnoid Cyst Caused by Rupture of Internal Carotid-Posterior Communicating Artery Aneurysm -Case Report-

Kajiwara

Tanaka

Kan

et al. 2008

Neurol. Med. Chir.(Tokyo)

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A 46-year-old woman was admitted with generalized convulsion and deep coma which occurred 3 weeks after sudden onset of severe headache and pyrexia. Initial computed tomography did not reveal any abnormal findings except for an arachnoid cyst in the right middle fossa. Three weeks later repeat computed tomography showed intracystic hematoma in the arachnoid cyst with uncal herniation. Angiography revealed a right internal carotid-posterior communicating artery aneurysm. The neck of the aneurysm was clipped successfully, but hemiparesis was persistent postoperatively. Angiography is required for investigation of intracystic hematoma of an arachnoid cyst, especially in the absence of head injury, to avoid delayed diagnosis of any ruptured aneurysm.

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“…Intracranial perianeurysmal cysts are a rare finding in patients with cerebral aneurysms and have been increasingly reported since Marcoux et al first published their findings in 2002 1–12. Perianeurysmal cysts are a different entity from subarachnoid cysts which on occasion can be found surrounding an aneurysm 13–15. Common, but not definitive, features that may allow differentiation of arachnoid cysts from perianeurysmal cysts are timing of development, location, adjacent structural characteristics and cyst contents.…”

Section: Introductionmentioning

confidence: 99%

Intracranial perianeurysmal cysts: case series and review of the literature

Liang

Efendy²,

Winter

et al. 2021

J NeuroIntervent Surg

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BackgroundIntracranial perianeurysmal cysts are a rare finding associated with cerebral aneurysms. Patients may present with symptoms secondary to mass effect from perianeurysmal cysts requiring drainage. These lesions can masquerade as neoplasms if dedicated vascular imaging is not performed, leading to misdiagnosis.MethodA retrospective search of our database was done for intracranial aneurysms that have been treated between 1998 and 2020. A literature search was then performed on PubMed and Google Scholar with the search terms ‘aneurysm’, ‘intracranial/intracerebral’, ‘cyst’, and ‘perianeurysmal cyst’. Patient demographics, aneurysms and cysts characteristics were then summarized as a table and in the discussion.ResultsThree cases where intracranial aneurysm had associated perianeurysmal cysts were found in our database. Combined with the available literature a total of 19 cases of perianeurysmal cysts have thus far been reported since this entity was first described in 2002. A significant number of perianeurysmal cysts (5/19) required intervention. In 5/19 cases the patient presented with a perianeurysmal cyst without a history of subarachnoid hemorrhage. Of the 10 cases where aneurysm follow-up was reported there were 5 cases where there was aneurysm recurrence necessitating re-treatment.ConclusionSignificant variability exists in the patient demographics, aneurysm and cyst characteristics of perianeurysmal cysts. This suggests that there is no single unified etiology and pathogenesis. These lesions are a rare finding and at present do not appear to carry diagnostic or prognostic significance. Management of perianeurysmal cysts is case-dependent and intervention should be considered when treating the related aneurysm, especially in patients with secondary symptoms.

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A Form of Dysplasia or a Fortuitous Association? A Cerebral Aneurysm Inside an Arachnoid Cyst

Cited by 8 publications

References 29 publications

Arachnoid Cyst with a Non-traumatic Acute Subdural Hematoma in an Eleven-year-old Patient

Arachnoid Cyst with a Non-traumatic Acute Subdural Hematoma in an Eleven-year-old Patient

Intracystic Hematoma of Middle Fossa Arachnoid Cyst Caused by Rupture of Internal Carotid-Posterior Communicating Artery Aneurysm -Case Report-

Intracranial perianeurysmal cysts: case series and review of the literature

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