Resolution of the large middle fossa arachnoid cyst without any identifiable cause: Case report

Kikuchi, Asami; Chernov, Mikhail; Hagiwara, Shinji; Ohbuchi, Hidenori; Kubota, Yuichi

doi:10.1016/j.jocn.2021.03.029

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…[4,11] Such minor events are often overlooked and the AC may spontaneously disappear. [6,9] It has also been suggested that the size change mechanism involves the influx of CSF through a one-way valve, as seen in a case of cyst shrinkage after fibrin glue injection for a sacral AC. [16] us, inflammation caused by meningitis, hemorrhage, or tumors may close this one-way valve and shrink the AC.…”

Section: Discussionmentioning

confidence: 99%

“…[16] us, inflammation caused by meningitis, hemorrhage, or tumors may close this one-way valve and shrink the AC. [6] Another theory is that the AC shrinks due to intra-and extra-cystic changes in the osmotic gradient. [4] However, since the present case was hemorrhagic, the mechanism of disappearance may differ from such simple cyst wall ruptures, one-way valve closure, or loss of osmotic difference.…”

Section: Discussionmentioning

confidence: 99%

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Spontaneous resorption of a convexity arachnoid cyst associated with intracystic hemorrhage and subdural hematoma: A case report

Hanai

Yanaka

Aiyama

et al. 2023

Surgical Neurology International

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Background: Intracranial arachnoid cysts (ACs) are developmental anomalies usually filled with cerebrospinal fluid (CSF), rarely resolving throughout life. Here, we present a case of an AC with intracystic hemorrhage and subdural hematoma (SDH) that developed after a minor head injury before gradually disappearing. Neuroimaging demonstrated specific changes from hematoma formation to AC disappearance over time. The mechanisms of this condition are discussed based on imaging data. Case Description: An 18-year-old man was admitted to our hospital with a head injury caused by a traffic accident. On arrival, he was conscious with a mild headache. Computed tomography (CT) revealed no intracranial hemorrhages or skull fractures but an AC was seen in the left convexity. One month later, follow-up CT scans showed an intracystic hemorrhage. Subsequently, an SDH appeared then both the intracystic hemorrhage and SDH gradually shrank, with the AC disappearing spontaneously. The AC was considered to have disappeared, along with the spontaneous SDH resorption. Conclusion: We present a rare case where neuroimaging demonstrated spontaneous resorption of an AC combined with intracystic hemorrhage and SDH over time, which may provide new insights into the nature of adult ACs.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Spontaneous resorption of a convexity arachnoid cyst associated with intracystic hemorrhage and subdural hematoma: A case report

Hanai

Yanaka

Aiyama

et al. 2023

Surgical Neurology International

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“…There are also theories stating that arachnoid cysts that increase in size have a unilateral valve mechanism through which the cerebrospinal fluid flows into the cyst. [4][5][6][7] It should be accepted that arachnoid cysts, which do not have a unilateral valve mechanism, are therefore static formations. However, it cannot be defended that arachnoid cysts, which have a compression effect on the surrounding tissues and cranium, are static.…”

Section: Discussionmentioning

confidence: 99%

Giant Arachnoid Cyst With Spontaneous Shrinking: A Case Report

Asan

2022

MNJ

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Arachnoid cysts occur in approximately 1% of all intracranial space-occupying lesions and do not require a very high rate of surgical intervention. Arachnoid cysts are cystic formations containing cerebrospinal fluid. It is argued that the enlargement of the arachnoid cysts increases in volume with the unilateral valve mechanism. They are generally considered static formations because they do not tend to grow. A 16-year-old male patient was evaluated for headache attacks resistant to medical treatment. A giant arachnoid cyst located in the left temporal region was detected in the cranial MRI examination of the patient who had no history of head trauma or cranial operation in his medical history. In the MRI examination two years later, it was seen that the arachnoid cyst had almost completely disappeared. However, it was also found that it caused cambering in the temporal bone in the adjacent region. This finding supports that not all arachnoid cysts are static formations; they may have their internal dynamics and even cause shape changes in the surrounding tissues and even the cranium.

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Spontaneous regression of an interhemispheric arachnoid cyst: illustrative case

Fuentes,

Jane

2024

Childs Nerv Syst

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Background Intracranial arachnoid cysts are benign collections of cerebrospinal fluid that are often asymptomatic and discovered incidentally. An interhemispheric location of these lesions is rare, with only a few such cases reported in the literature. Though spontaneous regression of arachnoid cysts has been described in other locations, to date this phenomenon has not been reported in interhemispheric fissure cysts. Observations In this report, we describe a patient with a large, multiloculated interhemispheric arachnoid cyst diagnosed on prenatal ultrasound. She did not exhibit neurologic deficits or signs of increased intracranial pressure and was observed with serial imaging. After several years of observation, imaging revealed spontaneous and progressive decrease in the cyst size. Lessons We illustrate a case of regression of an interhemispheric arachnoid cyst in a pediatric patient. To our knowledge, this is the first reported case of spontaneous shrinkage of an arachnoid cyst in this location. Although the current presentation is rare, this reporting adds to the current understanding of natural history of arachnoid cysts and provides an example of radiographical improvement without intervention of a cyst located within the interhemispheric fissure.

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Resolution of the large middle fossa arachnoid cyst without any identifiable cause: Case report

Cited by 3 publications

References 4 publications

Spontaneous resorption of a convexity arachnoid cyst associated with intracystic hemorrhage and subdural hematoma: A case report

Spontaneous resorption of a convexity arachnoid cyst associated with intracystic hemorrhage and subdural hematoma: A case report

Giant Arachnoid Cyst With Spontaneous Shrinking: A Case Report

Spontaneous regression of an interhemispheric arachnoid cyst: illustrative case

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