Cyst in the projection near the posterior horn of the lateral ventricleTags: Brain sonography(Neurosonography), GE Logiq E, Clinical report, Pediatric Posts 16:02 04-02-2024 Cyst in the projection near the pos...#1 Child 1 month at a routine screening. On neurosonography, in the projection near the posterior horn of the left lateral ventricle, a cyst measuring up to 10x11x13 mm is visualized (differential diagnosis: brain cyst, Rathke cleft cyst, pituitary cyst, quadrigeminal cistern cyst, etc.)