Prenatal diagnosis of vermian cyst: a new type of posterior fossa cyst.
Pediatr Radiol
; 53(3): 461-469, 2023 03.
Article
em En
| MEDLINE
| ID: mdl-36274068
ABSTRACT
BACKGROUND:
Prenatal diagnoses of cystic malformations of the posterior fossa mainly encompass arachnoid cysts, Blake's pouch cysts and Dandy-Walker syndrome. To date, vermian cysts have not been reported prenatally.OBJECTIVES:
To report a series of fetuses with a vermian cyst. MATERIALS ANDMETHODS:
This was a single-center retrospective study conducted from 2012 to 2021. We included all fetuses presenting with a vermian cyst and excluded all other types of posterior fossa cyst. The cyst was visible at prenatal ultrasound (US) and/or magnetic resonance imaging (MRI). Postnatal imaging and/or clinical outcome data were available.RESULTS:
Sixteen fetuses fulfilled the inclusion criteria with a strong female predominance (n=13). US and MRI were performed at a mean gestational age of 29+5 and 33+1 weeks, respectively. In all patients, the cyst was in the vermian horizontal fissure. The mean longest dimension was about 10 mm. The vermis and other posterior fossa structures were otherwise normal. At postnatal imaging, 13 children underwent brain imaging including 11 MRIs with complete regression (n=9), stability (n=1) and increase in size (n=3) of the cyst. Psychomotor development was normal in 14 children. One child (with an inner ear malformation) showed a slight delay in walking and language acquisition. Slight walking ataxia was present in another child.CONCLUSION:
We report 16 fetuses with posterior fossa cysts located within the vermis at the level of the horizontal fissure, diagnosed at US and/or MRI and carrying an overall excellent neurological prognosis.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cistos
/
Síndrome de Dandy-Walker
/
Malformações do Sistema Nervoso
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
/
Prognostic_studies
Limite:
Child
/
Female
/
Humans
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Infant
/
Male
/
Pregnancy
Idioma:
En
Revista:
Pediatr Radiol
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
França