Don't hesitate to call Keystone Center ECU in Chester, PA. We are committed to your satisfaction. Call us today. Established in 1994, the KeyStone Center Extended Care Unit is a residential center that treats individuals with sexually compulsive behavior and trauma. It offers a range of career impact counseling, medical evaluation and psychiatric care services. The center also provides couple and individual counseling services. The KeyStone Center Extended Care Unit conducts several educational programs for families. In addition, it provides psychological assessment and testing services. The center s treatment components address the cognitive, behavioral, spiritual, emotional and psychological aspects of addiction and recovery. It also offers sexual health assessment and stress and anger management services. Located in Chester, Pa., it is a part of the KeyStone Center, which specializes in the treatment of several addictions, such as gambling, drug and alcohol.