Foreword. 1. The developmental anatomy and histology of the human central nervous system (R. O'Rahilly and F. Mueller, Davis, CA). 2. Errors in the differentiation of the central nervous system (B. Kaellen, Lund, Sweden). 3. Epidemiology of central nervous system malformations (N.C. Myrianthopoulos, Bethesda, MD). 4. Anencephaly (R.J. Lemire, Seattle, WA). 5. Encephalocele and cranium bifidum (R.L. McLaurin, Cincinnatti, OH). 6. Craniosynostosis (D. Bixler and R.E. Ward, Indianapolis, IN). 7. Iniencephaly (S.N. Aleksic and G.N. Budzilovich, New York, NY). 8. Craniolacunia, foramina parietalia permagna, aplasia of the sphenoid wings (N.C. Myrianthopoulos, Bethesda, MD). 9. Agenesis of the corpus callosum (J. Aicardi, J.-J. Chevrie and J. Baraton, Paris, France). 10. Agenesis or hypoplasia of cerebellar structures (G. Macchi and M. Bentivoglio, Rome, Italy). 11. Agenesis and anomalies of other brain structures (R.G. Robinson, Dunedin, New Zealand). 12. Agenesis of the cranial nerves (J.F. Mellinger and M.R. Gomez, Rochester, MN). 13. Holoprosencephaly (cyclopia-arhinencephaly) (W. DeMyer, Indianapolis, IN). 14. Cytoarchitectonic abnormalities (J.C. Larroche, Paris, France, and F. Razavi-Encha, Creteil, France). 15. Microcephaly (R.H.A. Haslam, Toronto, Canada). 16. Hydrocephaly (T.H. Milhorat, Brooklyn, NY). 17. Stenosis of the aqueduct of Sylvius (C. Lapras, M. Tommasi and P. Bret, Lyon, France). 18. The Dandy-Walker syndrome (M.H. Epstein and C.E. Johanson, Providence, RI). 19. Hydranencephaly (J.H. Halsey, Jr., Birmingham, AL). 20. Porencephaly (H. Gross and W. Grisold, Vienna, Austria). 21. The phakomatoses (V.M. Riccardi, Houston, TX). 22. Bone malformations of the cranio-cervical region (L.D. Cahan, D.R. Malkasian, Orange, CA, and J.R. Bentson, Los Angeles, CA). 23. The Chiari II malformation (C. Bamberger-Bozo, Suresnes, France). 24. Scoliosis and other spine malformations (R. Roaf, Liverpool, UK). 25. Hydromyelia (J.B. Foster, Newcastle-upon-Tyne, UK). 26. Diastematomyelia and diplomyelia (J.P. Mathieu and J. Dube, Montreal, Canada). 27. Syringomyelia and syringobulbia (M.A. Nogues, Buenos Aires, Argentina). 28. Vertebral canal stenosis (A. Wackenheim, Strasbourg, France). 29. Spina bifida (K. Welch and K.R. Winston, Boston, MA). 30. Caudal aplasia (B. Kaellen, Lund, Sweden). 31. Down syndrome (H. Zellweger and S.R. Patil, Iowa City, IA). 32. Chromosomal anomalies excluding Down syndrome (H. Zellweger and S.R. Patil, Iowa City, IA). 33. New deletion and ring chromosome syndromes (M.O. Rethore and J. Pinet, Paris, France). Index.