OBJECTIVES:
I. Investigate the paradigm of response-based therapy for low-risk Hodgkin's lymphoma by eliminating involved-field radiotherapy (IFRT) in patients who achieve a complete remission (CR) after initial chemotherapy.
II. Investigate whether 3 courses of doxorubicin hydrochloride, vincristine, prednisone, and cyclophosphamide (AV-PC) for the treatment of low-risk Hodgkin's lymphoma is sufficient to induce CR in at least 80% of patients.
III. Investigate whether patients who experience a low-risk relapse after initial treatment with chemotherapy alone can be successfully treated with a salvage regimen comprising ifosfamide and vinorelbine ditartrate with dexamethasone, etoposide phosphate, cisplatin, and cytarabine (IV/DECA) and IFRT.
IV. Maintain the overall survival for patients with low-risk Hodgkin's lymphoma at or above 97%.
V. Determine the prognostic significance of very early response as measured by fludeoxyglucose-positron emission tomography (FDG-PET) or gallium after the first course of chemotherapy.
VI. Evaluate the prognostic significance of elevation of erythrocyte sedimentation rate and C-reactive protein at the time of diagnosis in patients with low-risk Hodgkin's lymphoma on CR rate and relapse rate after chemotherapy alone.
VII. Determine the frequency and severity of late effects of therapy, including thyroid dysfunction, infertility, cardiotoxicity, and second malignant neoplasms.
OUTLINE: This is a multicenter study.
INITIAL CHEMOTHERAPY: Patients receive doxorubicin hydrochloride intravenously (IV) over 10-30 minutes and cyclophosphamide IV over 1 hour on days 1-2, vincristine IV on days 1 and 8, prednisone orally (PO) on days 1-7, and filgrastim (G-CSF) subcutaneously (SC) on days 3-7 and 9-14. Treatment repeats every 21 days for up to 3 courses in the absence of disease progression or unacceptable toxicity.
Patients achieving complete remission (CR) proceed to observation. Patients achieving partial remission proceed to radiotherapy. Patients who have a low-risk relapse after achieving CR on initial chemotherapy proceed to salvage chemotherapy followed by radiotherapy. Patients who have stable disease or disease progression go off study.
SALVAGE CHEMOTHERAPY: Patients receive ifosfamide IV continuously on days 1-4, vinorelbine ditartrate IV over 6-10 minutes on days 1-5, and G-CSF SC or IV beginning on day 6 and continuing until blood counts recover. Treatment repeats every 21 days for 2 courses. Patients then receive dexamethasone IV over 15 minutes every 12 hours, etoposide phosphate IV over 3 hours every 12 hours, and cytarabine IV over 3 hours every 12 hours on days 1 and 2; cisplatin IV over 6 hours on day 1; and G-CSF SC or IV beginning on day 3 and continuing until blood counts recover. Treatment repeats every 21 days for 2 courses. Patients then proceed to radiotherapy.
INVOLVED-FIELD RADIOTHERAPY (IFRT): Beginning 4 weeks after completion of chemotherapy, patients undergo IFRT once daily, 5 days a week, for 2.8 weeks. Patients who do not achieve CR go off study.
After completion of study treatment, patients are followed periodically for up to 10 years.
