The purpose of this study is to learn whether we can modify treatment for Hodgkin disease in a way that reduces therapy for rapid early responders and increases therapy (and hopefully outcome) in slow early responders.  In particular, the goals of the study are:

• To find out if more therapy for slow early responders is better than the standard therapy.
• To find out if patients who have an early complete response to chemotherapy can be treated successfully without radiation therapy.
• To find out if certain factors like symptoms, age, sex, and blood test results predict how well a patient will respond to treatment.
• To find out which late effects occur after Hodgkin disease treatment and how often they occur; and
• To collect information on how PET scans provide useful information about which places in the body are affected by Hodgkin Disease in children and teenagers.