RT Journal Article SR Electronic T1 Ventriculus terminalis of the conus medullaris: MR findings in children. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1421 OP 1426 VO 16 IS 7 A1 L T Coleman A1 R A Zimmerman A1 L B Rorke YR 1995 UL http://www.ajnr.org/content/16/7/1421.abstract AB PURPOSE To determine the appearance of the ventriculus terminalis of the conus medullaris and the frequency with which it is seen on MR. METHODS Four hundred eighteen normal spine MR examinations were reviewed. RESULTS Eleven (2.6%) of 418 children, all younger than 5 years of age, demonstrated an ovoid, nonenhancing, smooth dilation of the central canal within the conus medullaris. Averaged volume of the oblate spheroid was 0.18 cm3. Fluid within the cavity behaved as cerebrospinal fluid on all pulse sequences, and there was no abnormal signal in the cord tissue surrounding the cavity. CONCLUSION Asymptomatic localized dilatation of the ventriculus terminalis is a normal developmental phenomenon that can be seen on MR.