The International Workshop on Cancer Genetic & Cytogenetic Diagnostics, is a yearly course focusing on all aspects concerning cancer (cyto-)genetics in a diagnostic setting. Basic technical aspects covering conventional karyotyping, methods and principles in fluorescence in situ hybridization (FISH), micro-array genomic profiling, MLPA, QPCR, gene sequencing and next generation sequencing will be presented. In addition to the various laboratory techniques there will be presentations regarding quality assessment and genetic abnormalities in various types of leukaemia’s and solid cancers. The presentations will be interspersed with practical exercises with the ISCN 2016 system for chromosome aberrations, interpretation of cases, and use of databases. Participants will have the opportunity to present their own observations which are of interest or difficult to interpret. Since most presentations start with basic knowledge and end with up to date information regarding cancer genetics, this workshop will be of interest for all who are working in the field of cancer (cyto-)genetic diagnostics.