This report provides medical validations for three conditions of concern regarding the health of Vietnam veterans and their children - adrenal gland cancer in veterans' children, the four main types of leukaemia in veterans and their children, and non-Hodgkin's lymphoma in veterans. It is the second supplementary report to Morbidity of Vietnam Veterans: Volume 3 Validation Study and responds to a recommendation of that study that 'cancer of the adrenal gland in veterans' children be further investigated and compared to a derived community standard'. Comparisons have also been made for the four leukaemia types to expand on the total leukaemia comparisons from the study, while the non-Hodgkin's lymphoma comparisons are revisions to those included in the validation report. This report further extends the knowledge about the health of Vietnam veterans and their families.