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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 25:29-31, January 2004
© 2004 American Society of Neuroradiology

Case Report
PEDIATRICS

Partial Rhombencephalosynapsis

Philippe Demaerel^a, Catherine Morel^a, Lieven Lagae^b and Guido Wilms^a

^a Department of Radiology, University Hospitals, Leuven, Belgium
^b Department of Pediatrics, University Hospitals, Leuven, Belgium

Address correspondence to Dr. Philippe Demaerel, Department of Radiology, University Hospitals Gasthuisberg, Herestraat 49, B-3000 Leuven, Belgium

Summary: We describe an infant in whom partial rhombencephalosynapsis was diagnosed by using MR imaging. The anterior vermis and nodulus were normally developed, but part of the posterior vermis was deficient. There was partial fusion of the hemispheres in the inferior part of the cerebellum. Partial rhombencephalosynapsis is described for the first time, and our findings support the recent embryologic observations.