Combination Chemotherapy in Treating Young Patients With Hodgkin's Lymphoma

OBJECTIVES:

Primary

• Determine whether the 5-year event-free survival (EFS) rate in pediatric patients with Hodgkin's lymphoma with an adequate response after 2 courses of vincristine, etoposide, prednisone, and doxorubicin hydrochloride (OEPA) (without radiotherapy) are consistent with an estimated target EFS rate of 90%.
• Compare the EFS (without a deterioration) of patients treated with procarbazine hydrochloride vs dacarbazine (treatment groups 2 and 3).
• Determine the treatment outcome of a standardized risk-adapted relapse strategy in these patients.

Secondary

• Determine whether the 5-year EFS rate in patients with Hodgkin's lymphoma with an inadequate response after 2 OEPA courses and standard involved-field radiotherapy are consistent with an estimated target EFS rate of 90%.
• Determine whether a positive positron emission tomography scan before planned high-dose chemotherapy with autologous stem cell transplantation has a negative prognostic significance.
• Compare the effect of dacarbazine vs procarbazine on the rate of infertility in males and premature menopause in females (treatment groups 2 and 3).

Tertiary

• Determine the impact of real-time central staging and response assessment on treatment outcome in these patients.

OUTLINE: This is a randomized, controlled, parallel-group, open-label, multicenter study. Patients are stratified according to staging and response assessment (central vs local) and disease stage (IA/B or IIA [first-line treatment group 1] vs I_EA/B, II_EA, IIB, or IIIA [first-line treatment group 2] vs II_EB, III_E A/B, IIIB, or IVA/B [first-line treatment group 3]).

• First-line treatment group 1: Patients receive oral prednisone (or prednisolone) 3 times daily on days 1-15, vincristine IV on days 1, 8, and 15, doxorubicin hydrochloride IV over 1-6 hours on days 1 and 15, and etoposide (or etoposide phosphate) IV over 1-2 hours on days 1-5 (OEPA).

Treatment repeats every 28 days for 2 courses in the absence of unacceptable toxicity. Patients are assessed by fludeoxyglucose F 18 positron emission tomography (\^18FDG-PET) scan. Patients with inadequate response undergo radiotherapy within 35 days after completion of OEPA.

• First-line treatment group 2: Patients receive OEPA as in group 1. After completion of OEPA, patients are randomized to 1 of 2 treatment arms.

  • Arm I: Patients receive oral prednisone (or prednisolone) 3 times daily and oral procarbazine hydrochloride 2-3 times a day on days 1-15 and vincristine IV and cyclophosphamide IV over 1 hour on days 1 and 8 (COPP).
  • Arm II: Patients receive oral prednisone (or prednisolone) 3 times daily on days 1-15, dacarbazine IV over 15-30 minutes on days 1-3, and vincristine IV and cyclophosphamide IV over 1 hour on days 1 and 8 (COPDAC).

In both arms, treatment repeats every 28 days for 2 courses in the absence of unacceptable toxicity. Patients are assessed by \^18FDG-PET scan. Patients with an inadequate response undergo radiotherapy within 35 days after completion of COPP or COPDAC.

• First-line treatment group 3: Patients receive OEPA as in group 1. After completion of OEPA, patients are randomized to 1 of 2 treatment arms.

  • Arm I: Patients receive COPP as in arm I of group 2.
  • Arm II: Patients receive COPDAC as in arm II of group 2. In both arms, treatment repeats every 28 days for 4 courses in the absence of unacceptable toxicity. Patients are assessed by \^18FDG-PET scan. Patients with an inadequate response undergo radiotherapy within 35 days after completion of COPP or COPDAC.

Patients with biopsy-confirmed disease progression OR relapse after first-line treatment on this study or on protocols DAL-HD 90, GPOH-HD 95, GPOHHD 2002 Pilot, or similar treatment proceed to second-line therapy. Patients are stratified according to relapse/progression status (late relapse from first-line treatment group 1 [second-line treatment group 1] vs early relapse from first-line treatment groups 1, 2, or 3 or late relapse from first-line treatment groups 2 or 3 [second-line treatment group 2] vs disease progression [second-line treatment group 3]). Patients undergo a \^18FDG-PET scan prior to beginning second-line therapy.

• Second-line treatment group 1: Patients receive ifosfamide IV over 22 hours and etoposide IV over 1-2 hours and oral prednisone three times daily on days 1-5 (IEP). Patients then receive doxorubicin hydrochloride IV over 1-6 hours, bleomycin IV, vinblastine IV, and dacarbazine IV over 15-30 minutes on days 22 and 36 (ABVD). Treatment repeats every 50 days for 2 courses in the absence of disease progression or unacceptable toxicity.

After chemotherapy treatment, patients undergo radiotherapy.

• Second-line treatment group 2: Patients receive IEP and ABVD as in group 1. Autologous stem cells are collected after course 1 or 2 of IEP/ABVD.

After chemotherapy, patients with an adequate response undergo radiotherapy. Patients with an inadequate response undergo high-dose chemotherapy comprising carmustine IV over 1-2 hours on day -7, etoposide IV and cytarabine IV over 30 minutes twice daily on days -6 to -3, and melphalan IV over 1½ hours on day -2. Patients then undergo autologous hematopoietic stem cell transplantation (HSCT).

Patients undergo a \^18FDG-PET scan on day 50-54. Patients with \^18FDG-PET scan positive disease undergo radiotherapy.

• Second-line treatment group 3: Patients receive IEP and ABVD as in group 1. All patients then undergo high-dose chemotherapy and HSCT as in group 2.

Patients undergo a \^18FDG-PET scan on day 50-54. Patients with \^18FDG-PET scan positive disease undergo radiotherapy.

After completion of study therapy, patients are followed periodically for 5 years.

PROJECTED ACCRUAL: A total of 2,150 patients will be accrued for this study.