Disorders of the Corpus Callosum Booklet Series: “Vol. 1: Introduction to Agenesis of the Corpus Callosum” By L. Paul, PhD. This 20-page booklet provides a basic overview of what is the corpus callosum, what is a callosal disorder and how it happens. Provides an explanation of the various types of callosal disorders (agenesis, partial and hypoplasia), how the disorder is diagnosed, what to expect & a glossary of terms. Good publication to give your child’s physicians, therapists and educators