Prenatal Diagnosis of a Cavum Veli Interpositi

Abstract

he presence of an interhemispheric supratentorial fluid collection requires an attentive analysis for differentiation between interhemispheric supratentorial cystlike fluid collection lesions and pathologic cystic lesions. Interhemispheric supratentorial fluid lesions are a heterogeneous group of lesions with respect to their origin, natural history, association with other anomalies, and especially prognosis. They may represent physiologic median structures without clinical importance, such as an enlarged cavum vergae or cavum veli interpositi (CVI). 1 However, the differential diagnosis of midline cystic cerebral lesions includes an enlarged third ventricle, a vein of Galen malformation, an interhemispheric cyst associated with agenesis of the corpus callosum, a suprasellar arachnoid cyst, a porencephalic cyst, a glioependimal cyst, schizencephaly, a cystic neoplasm, and intracranial hemorrhage.The clinical spectrum and prognosis of these abnormalities are difficult to delineate because of the rarity of each entity and the different associations. The cystlike structures related to median structures are considered variants of physiologic structures, whereas the other structures include pathologic processes that may be associated with neurodevelopmental delays. We report a case of prenatal diagnosis of a CVI by 2-dimensional (2D) sonography, color Doppler imaging, 3-dimensional (3D) tomographic imaging, and 3D high-definition flow. The findings were confirmed by postnatal magnetic resonance imaging (MRI).

First‐trimester septated cystic hygroma and cavum velum interpositum cyst

“…Prenatal diagnosis of cavum velum interpositum cysts has been reported infrequently 9–11. Infants with prenatally diagnosed cavum velum interpositum cysts, which are isolated, single, stable in size and not associated with other anomalies, usually have a favorable outcome 9–11.…”

“…Prenatal diagnosis of cavum velum interpositum cysts has been reported infrequently 9–11. Infants with prenatally diagnosed cavum velum interpositum cysts, which are isolated, single, stable in size and not associated with other anomalies, usually have a favorable outcome 9–11. Notwithstanding, hydrocephalus resulting from a cavum velum interpositum cyst, although rare, may at times require surgical fenestration of the cyst or ventriculoperitoneal shunting 12, 13…”

Ultrasound of the Fetal Veins Part 3: The Fetal Intracerebral Venous System

“…20 splenium of corpus callosum ( • " Fig. 3, 10,11) to form together with the paired basal veins of Rosenthal ( • " Fig. 3, 10) the great cerebral vein or vein of Galen.…”

“…Dieser typische Verlauf der intrazerebralen Venen vor und unter dem Cavum veli interpositi ( • " Abb. 16B-17) diente daher auch der pränatalen Beschreibung dieser Normvariante [11].…”

“…With the publication of guidelines and review articles on fetal neurosonography, there has been a growing interest in the comprehensive ultrasound examination of the central nervous system [8 -10]. However, clinical interest in the brain vascularity in the fetus under normal and abnormal conditions has remained scarce [2, 3, 11,12], when compared for example with the venous system of the abdomen or heart [13,14]. Reasons for this can be due to the complex anatomy of this venous system on the one hand and on the other hand to the inability to image the intracerebral veins on ultrasound except with sensitive color or power Doppler ultrasonography.…”