First use of electromagnetic setup and real-time tracking in a pediatric patient with vaginal rhabdomyosarcoma.

We report the first use of the Calypso system (Calypso Medical, Seattle, WA) in a pediatric patient with group III vaginal rhabdomyosarcoma. The Calypso system was used to improve patient setup, to limit anesthesia, to provide for real-time tracking of target location, and to minimize the need for daily portal imaging studies and their associated extraneous radiation dose.