Biologic and technologic advances generated from The Human Genome Project are having a dramatic impact on the expanding role of nurses in current health care practice. New genetic research needs to be transformed rapidly into clinical protocols with recommendations for delivering care to targeted populations. Nurses can contribute significantly, as part of an interdisciplinary approach, to translate genome-based knowledge into benefits for health care and society. In this context, we describe a clinical-genetic investigation protocol, as well nursing diagnosis, interventions and outcomes for clients with Turner Syndrome (TS) at risk for develop gonadal tumors, due the presence of a normal or abnormal Y chromosome.