Infratentorial arachnoid cysts

Little, John R.; Gómez, Manuel R.; MacCarty, Collin S.

doi:10.3171/jns.1973.39.3.0380

Cited by 129 publications

(54 citation statements)

References 18 publications

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“…Sixty cases have been reported including ours, 14,18,30) but only 16 have been adults 2,4,5,13,14,18,19,22,25,27,33,36) (Table 1). Infratentorial arachnoid cysts are mostly congenital, 11,34) although acquired pathologies such as diverticulum from ventricles (due to increased intraventricular pressure), 22) inflammation, 7,22,37) and trauma 7,21,22) are also causative mechanisms. Incarceration of ectopic tissue in form of a secretory organ or choroid plexus may rarely develop from embryonic rests, 3,21,22,25,29,35) impeding the free circulation of the fluid.…”

Section: Discussionmentioning

confidence: 99%

“…Paracollicular arachnoid cyst, 5,21,25) cyst posterior to the third ventricle, 17,21,23) tentorial notch arachnoid cyst, 22) cyst of cisterna ambiens, 22) paramesencephalic cyst, 12) and parapineal cyst 12) are all synonyms for quadrigeminal cistern arachnoid cyst. Sixty cases have been reported including ours, 14,18,30) but only 16 have been adults 2,4,5,13,14,18,19,22,25,27,33,36) (Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…Retrocerebellar and cerebellopontine angle cysts are decidedly more common. 22) Quadrigeminal arachnoid cysts are the third most common infratentorial arachnoid cysts and occur between the collicular plates and the incisural notch of the tentorium. 3,33) The symptomatology depends on the extent and severity of the compression on the brain stem, cerebellum, and aqueduct.…”

Section: Introductionmentioning

confidence: 99%

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Unusual Arachnoid Cyst of the Quadrigeminal Cistern in an Adult Presenting With Apneic Spells and Normal Pressure Hydrocephalus. Case Report.

Topsakal

Kaplan

Erol

et al. 2002

Neurol. Med. Chir.(Tokyo)

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A 67-year-old woman was admitted to our clinic with symptoms of normal pressure hydrocephalus, lower cranial nerve pareses, and pyramidal and cerebellar signs associated with respiratory disturbances. Computed tomography (CT) and magnetic resonance imaging revealed a 4.7 × 5.4 cm quadrigeminal arachnoid cyst causing severe compression of the tectum and entire brain stem, aqueduct, and cerebellum, associated with moderate dilation of the third and lateral ventricles. Emergency surgery was undertaken due to sudden loss of consciousness and impaired breathing. The cyst was totally removed by midline suboccipital craniotomy in the prone position. Postoperatively, her symptoms improved except for the ataxia and impaired breathing. She was monitored cautiously for over 15 days. CT at discharge on the 18th postoperative day revealed decreased cyst size to 3.9 × 4.1 cm. Histological examination confirmed the diagnosis of the arachnoid cyst of the quadrigeminal cistern. The patient died of respiratory problems on the 5th day after discharge. Quadrigeminal arachnoid cysts may compress the brain stem and cause severe respiratory disturbances, which can be fatal due to apneic spells. Patients should be monitored continuously in the preoperative and postoperative period until the restoration of autonomous ventilation is achieved.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Unusual Arachnoid Cyst of the Quadrigeminal Cistern in an Adult Presenting With Apneic Spells and Normal Pressure Hydrocephalus. Case Report.

Topsakal

Kaplan

Erol

et al. 2002

Neurol. Med. Chir.(Tokyo)

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“…2,8) Posterior fossa ACs are retrocerebellar in up to 50% of cases, with others found in the cerebellopontine angle and quadrigeminal regions. 6,10) More than 95% of ACs are unilateral or occupy the anatomical midline, with bilateral or multiple ACs almost exclusively restricted to the middle fossa, usually associated with other congenital malformations. 18) There was nothing in our patient's history or examination to suggest any such syndrome.…”

Section: T Killeen Et Almentioning

confidence: 99%

“…4,5,10,16) These cysts are sometimes seen in conjunction with cerebellar tonsillar ectopia (TE), although the relationship between these two entities is unclear. 5,11) Bilateral ACs in the posterior fossa are virtually unprecedented.…”

Section: Introductionmentioning

confidence: 99%

Bilateral Retrocerebellar Arachnoid Cysts Exerting Mass Effect and Associated With Cerebellar Tonsillar Ectopia in an Otherwise Healthy Adult

Killeen

Tromop-Van-Dalen

Alexander

et al. 2013

Neurol. Med. Chir.(Tokyo)

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Rarely, midline or unilateral posterior fossa arachnoid cysts (ACs) exert local mass effect resulting in the symptoms and signs of cerebellar and brainstem dysfunction. These cysts are sometimes seen in conjunction with cerebellar tonsillar ectopia (TE), although the relationship between these two entities is unclear. Bilateral ACs in the posterior fossa are virtually unprecedented. We describe the case of a 33-year-old man with a history of multiple minor head injuries observed to harbour asymptomatic, bilateral cerebrospinal fluid-density collections over the cerebellar hemispheres. Six years later, he presented with headaches, limb paraesthesias, and drop attacks. Computed tomography, magnetic resonance imaging, and operative findings during burrhole drainage of the lesions showed bilateral posterior fossa ACs, with associated cerebellar TE of 11 mm. The cysts partially recurred, necessitating reopening of the burrholes, after which the patient's symptoms resolved entirely. We then discuss the challenges in diagnosing this unusual case, the relationship between AC and TE, and the role of minor head injury in the symptomatic progression of AC.

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