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American Journal of Roentgenology, Vol 163, 1199-1203, Copyright © 1994 by American Roentgen Ray Society

ARTICLES

Dysraphic myelodysplasias associated with urogenital and anorectal anomalies: prevalence and types seen with MR imaging

BA Appignani, D Jaramillo, PD Barnes and TY Poussaint
Department of Radiology, Children's Hospital, Boston, MA 02115.

OBJECTIVE. The purpose of this study was to determine by MR imaging the prevalence and types of dysraphic abnormalities of the spinal cord (i.e., myelodysplasias) associated with urogenital and anorectal malformations of childhood. MATERIALS AND METHODS. Since 1987, 92 patients with imperforate anus complex, cloacal malformation, and cloacal exstrophy have had MR imaging as a screening examination for occult dysraphic myelodysplasia. The prevalence and types of myelodysplasia were determined for each group. RESULTS. The prevalence of dysraphic myelodysplasia in each group of children was 17% (1/6) for low imperforate anus (ectopic anus), 34% (11/32) for high imperforate anus (with fistulization), 46% (19/41) for cloacal malformation, and 100% (13/13) for cloacal exstrophy. The most common abnormalities in each group were tethered cord with intradural or filar lipoma in imperforate anus; low-placed or dysplastic conus medullaris and tethered cord with lipoma or myelolipoma in cloacal malformation; and lipomyelocele, lipomyelomeningocele, or lipomyelocystocele in cloacal exstrophy. CONCLUSION. Our results show that the prevalence of myelodysplasia as seen on MR imaging is high in patients with urogenital and anorectal anomalies.
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Copyright © 1994 by the American Roentgen Ray Society.