Department of Radio-Diagnosis, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Pondicherry, 600506, India.
Childs Nerv Syst. 2020 Feb;36(2):417-421. doi: 10.1007/s00381-019-04234-9. Epub 2019 Jun 1.
Falcine sinus is a normal midline embryonic venous sinus present in the fetal brain and usually disappears by birth. Persistent falcine sinus (PFS) has been reported as a normal variant or along with vein of Galen (VOG) malformation, encephalocele, and other abnormalities. Schizencephaly, either closed or open type, has been reported with other associated vascular anomalies. We report a 22-month-old child, who presented with delayed milestones and referred for magnetic resonance (MR) imaging, and the child was found to have PFS with associated bilateral temporo-occipital closed-lip schizencephaly, hippocampal abnormalities, falco-tentorial dehiscence, and white matter abnormalities. The vein of Galen and straight sinus were absent, and the internal cerebral veins were seen draining into superior sagittal sinus via the falcine sinus. These set of abnormalities are unique from abnormalities reported previously in association with the falcine sinus.
镰状窦是胎儿脑中存在的正常中线胚胎静脉窦，通常在出生时消失。永存镰状窦（PFS）已被报道为正常变异或与大脑大静脉（Galen 静脉）畸形、脑膨出和其他异常并存。裂脑畸形，无论是闭合型还是开放型，都与其他血管异常有关。我们报告了一名 22 个月大的儿童，因发育迟缓就诊并进行了磁共振成像（MR）检查，发现该儿童存在 PFS 合并双侧颞枕部闭合唇裂脑畸形、海马异常、镰状窦和天幕裂孔、脑白质异常。大脑大静脉和直窦缺失，内脑静脉通过镰状窦流入上矢状窦。这组异常与之前报道的与镰状窦相关的异常不同。
