Dr. Won Chang is the medical director at Comprehensive Cancer Care in Exton, and joined the staff in July 2000. His clinical areas of expertise include breast cancer as well as cancers of the head and neck, lung, gastrointestinal tract, and prostate. Dr. Chang has extensive experience in radiosurgery, stereotactic body radiation therapy, intensity-modulated radiation therapy, image-guided radiation therapy, transrectal ultrasound-guided prostate seed implants and has pioneered the use of accelerated partial breast irradiation using the MammoSite high-dose rate (HDR) brachytherapy delivery system.