Septum pellucidum agenesisTags: Brain sonography(Neurosonography), Images, Video, Clinical report, GE Logiq 400 MD, Pediatric Posts 14:10 07-01-2014 Septum pellucidum agenesis#1 Child of first month of life, scheduled brain ultrasound. Confluence of lateral ventricles because of absence of septum pellucidum. There is a bilateral lenticulostriate vasculopathy also. external link :: attachments(3) :::: file 1 :::: file 2 :::: file 3 :: HTML5 video plugin not supported!