Online Database is available for one year to all those who have purchased the 8th Edition of the book.
Users can renew access on an annual basis thereafter.
If you need to register, go to our registration form . As part of the registration process you will be asked to read and agree to a Terms of Service Agreement . If you have already registered, click here to login . A Catalog of Chromosomal Variants and Anomalies consists of a systematic collection of important citations from the world's literature reporting on all common and rare chromosomal alterations, phenotypes and abnormalities in humans. The database is organized by variations and anomalies, numerical anomalies, and chromosomal breakage syndromes.