Pediatric intraventricular arachnoid cysts in the body of lateral ventricle: surgical outcome and its embryologic background

Knie, Bettina; Morota, Nobuhito; Ihara, Satoshi; Tamura, Goichiro; Ogiwara, Hideki

doi:10.1007/s00381-016-3203-2

Cited by 15 publications

(10 citation statements)

References 28 publications

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“…Hence, in all of our fetuses, the cyst‐like structure was located on top of the third ventricle. This spatial relationship between the ICVs and the CVI has been described previously in the pediatric literature, as a diagnostic criterion that can distinguish a CVI from a quadrigeminal cistern cyst 28,29 .…”

Section: Discussionsupporting

confidence: 64%

Normal cavum veli interpositi at 14–17 gestational weeks: three‐dimensional and Doppler transvaginal neurosonographic study

Birnbaum

Barzilay

Brusilov

et al. 2021

Ultrasound in Obstet & Gyne

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Objectives To provide evidence to support the hypothesis that the midline cyst‐like fluid collection that is frequently observed on fetal brain ultrasound (US) imaging during the early second trimester represents a normal transient cavum veli interpositi (CVI). Methods This was a retrospective analysis of 89 three‐dimensional normal fetal brain volumes, acquired by transvaginal US imaging in 87 pregnant women between 14 and 17 gestational weeks. The midsagittal view was studied using multiplanar imaging, and the maximum length of the fluid collection located over (dorsal to) the tela choroidea of the third ventricle was measured. We calculated the correlation of the transverse cerebellar diameter (TCD) and of the maximum length of the fluid collection with gestational age according to last menstrual period. Color Doppler images were analyzed to determine the location of the internal cerebral veins with respect to the location of the fluid collection. Reports of the second‐trimester anatomy scan at 22–24 weeks were also reviewed. Results Interhemispheric fluid collections of various sizes were found in 55% (49/89) of the volumes (mean length, 5 (range, 3.0–7.8) mm). There was a strong correlation between TCD and gestational age (Pearson's correlation, 0.862; P < 0.001). There was no correlation between maximum fluid length and gestational age (Pearson's correlation, –0.442; P = 0.773). Color Doppler images were retrieved in 32 of the 49 fetuses; in 100% of these, the internal cerebral veins coursed within the echogenic roof of the third ventricle. The midline structures were normal at the 22–24‐week scan in all cases. Conclusions In approximately half of normal fetuses, during the evolution of the midline structures of the brain, various degrees of fluid accumulate transiently in the velum interpositum, giving rise to a physiologic CVI. Patients should be reassured that this is a normal phenomenon in the early second trimester that, if an isolated finding, has no influence on fetal brain development. © 2020 International Society of Ultrasound in Obstetrics and Gynecology

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Section: Discussionsupporting

confidence: 64%

Normal cavum veli interpositi at 14–17 gestational weeks: three‐dimensional and Doppler transvaginal neurosonographic study

Birnbaum

Barzilay

Brusilov

et al. 2021

Ultrasound in Obstet & Gyne

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“…More recently, in 2016, Knie el al. [32], analyzing followup neuroimages after neuroendoscopic cyst fenestration findings suggest that the IVACs were either originating from the velum interpositum cistern or from the quadrigeminal cistern. Based on this theory an arachnoid cyst that has its origin laterally may extent through the choroidal fissure to the lateral ventricle when growing.…”

Section: Etiopathogenesismentioning

confidence: 99%

Coexistence of central precocious puberty and intraventricular arachnoid cyst: a brief literature update

Oliván-Gonzalvo¹,

Calatayud-Maldonado²

2020

Iberoam J Med

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Central precocious puberty (CPP) is a rare disease. The mean annual incidence in girls is 0.8-1.1/100,000 and in boys 0-0.1/100,000. Intracranial arachnoid cysts (ICACs) are usually congenital and represent 1% of intracranial masses in newborns. Intraventricular location is rare. The objective of this work is to carry out a literature updated review of the coexistence of CPP and intraventricular arachnoid cyst (IVAC). ICACs are usually asymptomatic but can present with CPP in 10-40% of patients. IVACs represents only 0.3-1.4% of ICACs, and most seemed originate from the velum interpositum cistern. CPP in girls is usually idiopathic, while in 30-70% of boys are due to an intracranial lesion. Therefore, the coexistence of PPC and IVAC is very rare in boys and exceptional in girls. The exact mechanism of a cyst´s influence on the hypothalamic-pituitary axis is not completely understood. Theories include increased ventricular volume, associated mass effect on the hypothalamus, and direct compression of portions of the hypothalamic-pituitary axis. Analysis of LH peaks after GnRH testing is the gold standard for the diagnosis of CPP. Brain MRI should be part of the assessment in boys and also in girls since clinical features, including age and sex, are not helpful in predicting those with underlying brain pathology. In cases of CPP with IVAC, surgery does not have any effect on the course of pubertal development. The indication for surgery is the onset of neurological symptoms. The medical treatment selected, safe and effective, is GnRH analog depot preparations. In conclusion, there seems to be a consensus for the diagnosis and management of the coexistence of CPP and IVAC, but the etiopathogenesis is not yet well recognized.

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“…However, any study design that includes a control population that has either declined surgery or had surgery performed at a later time will be at risk of introducing selection bias. Another possible shortcoming is that external validity can be low if findings are applied to cysts with other intracranial locations than the temporal lobe [38][39][40][41]. The sample size is also too small to allow any conclusions regarding the laterality of the cyst.…”

Section: Limitations Of the Studymentioning

confidence: 99%

Cognition in Children with Arachnoid Cysts

Sandvik

Adolfsson

Jacobson

et al. 2020

JCM

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Background: This study aims to evaluate if children with temporal arachnoid cysts (AC) have cognitive symptoms and if neurosurgery improves these. Methods: A prospective case series study including consecutive pediatric patients with temporal AC. The children underwent neuroradiology, neuroopthalmologic evaluation, and a standard electroencephalography (EEG). Additionally, a neuropsychologist performed a standardized set of evaluations, with a one-year follow-up consisting of Weschler Intelligence Scale for Children version IV (WISC-IV), FAS (for verbal fluency), Boston Naming Test (BNT, for visual naming ability) and NEPSY-II (Developmental NEuroPSYchological Assessment) for verbal memory. Results: Fifteen children, 9 boys and 6 girls, were evaluated and 11 underwent surgery. The Full Scale IQ subscore (FSIQ) improved from M = 84.8 to M = 93.0 (p = 0.005). The preoperative Verbal Comprehension Index (VCI) was in the low average range (M = 86.7), improving to a level within the average range (M = 94.7, p = 0.001). Preoperative Perceptual Speed Index (PSI) was in the below average range (M = 81.5), improving to a level within the average range (M = 92.5, p = 0.004). Conclusion: ACs are a common finding in a pediatric neurosurgical setting. Our data suggest that some temporal AC have a negative effect on general cognitive ability and that this impairment can be improved by surgery. We suggest a standardized evaluation, including comprehensive and validated neuropsychological assessment tools, to thoroughly assess symptoms as well as the postoperative outcome.

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Pediatric intraventricular arachnoid cysts in the body of lateral ventricle: surgical outcome and its embryologic background

Cited by 15 publications

References 28 publications

Normal cavum veli interpositi at 14–17 gestational weeks: three‐dimensional and Doppler transvaginal neurosonographic study

Normal cavum veli interpositi at 14–17 gestational weeks: three‐dimensional and Doppler transvaginal neurosonographic study

Coexistence of central precocious puberty and intraventricular arachnoid cyst: a brief literature update

Cognition in Children with Arachnoid Cysts

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