It was with great pleasure that I accepted Professor Wackenheim's
invitation to write the preface of this most interesting monograph.
During the international course on neuroradiology in Obernai, organized
by Professor Wackenheim in 1978, an entire day was devoted to
discussions about various aspects of stenosis of the lumbar vertebral
canal. As Professor Wackenheim and his group, in particular Dr. E.
Babin, had thorough- ly studied this field, it was an excellent occasion
for the exchange of views through personal contact. Their support of
basic views such as attributing the cause of stenosis to a developmental
disturbance of growth of the neural element - the vertebral arc- and
spontaneous agreement about essentials in classification and
nomenclature facili- tated this exchange. Reading the present monograph
made me think back to 1949 when I wrote my first publication on stenosis
of the lumbar vertebral canal in a French volume that com- memorated my
teacher in neurosurgery, Professor Clovis Vincent. During the following
years it was impossible to publish a more detailed paper on the subject
in international journals since their editorial boards did not believe
in its occurrence. My first English papers were published in the Journal
of Bone and Joint Surgery (1954, 1955), but it was only during the 1970s
that this form of stenosis became more universally recog- nized.