Septal veins: a normal finding on neonatal cranial sonography.

The appearance of normal septal veins on cranial sonography is described. Septal veins are part of the deep cerebral (galenic) venous system. Improved technology allows these structures to be identified as they course in the walls of the cavity of the septum pellucidum (cavum septi pellucidi). These veins are normal structures that should not be misinterpreted as pathologic ventricular septations, calcifications, or evidence of prior intracranial hemorrhage.