Etoposide in combination as first-line chemotherapy for advanced Hodgkin disease. A Cancer and Leukemia Group B study

The cancer and leukemia group B pathology committee at 50

The Pathology Committee of the Cancer and Leukemia Group B (CALGB) is broadly and deeply integrated into the multidisciplinary clinical and scientific operations of the group. It has five major functions in CALGB. First, it insures the highest possible quality of pathologic data in tissue-based correlative science studies through comprehensive quality control of all tissues collected, banked, and distributed to investigators and of all morphology-based studies done within the CALGB. Within this context, the Pathology Committee has the goal of eliminating, to the greatest degree possible, variation in methodology, interpretation, and reporting of pathologic data that would compromise reproducibility of correlative science results and to assure accuracy, uniformity, and completeness of the pathologic data. Second, the committee provides expert pathologic consultation in the development of clinical trials and correlative science studies that involve pathologic issues and/or materials. Third, it provides high-quality tissue banking and centralized morphology-based technical support services (e.g., histologic sections for immunohistochemistry, tissue microarrays, etc.) for all CALGB investigators. Fourth, it initiates and executes high-quality pathologic research using CALGB and intergroup resources. Lastly, it provides group-wide education on pathology-related issues relevant to trial design, scientific study design, and specimen banking.

Primary systemic treatment of advanced Hodgkin's disease with EVA (etoposide, vinblastine, doxorubicin): 10-year follow-up

BACKGROUND

The most commonly used regimen for the treatment of advanced Hodgkin's disease (HD) is ABVD (doxorubicin, bleomycin, vinblastine and dacarbazine). Two of these components, bleomycin and dacarbazine, have defined toxicities such as pulmonary fibrosis and nausea/vomiting, and also uncertain single-drug activity. The EVA regimen (etoposide, vinblastine, doxorubicin) is an attempt to substitute a known active agent, etoposide, for bleomycin and dacarbazine.

PATIENTS AND METHODS

A series of 51 patients with advanced HD without prior systemic therapy were treated. The series included 12 stage II patients with bulky (>10 cm) mediastinal tumors, 10 of whom received complementary radiation therapy. The remaining patients received EVA only. Response, duration of response, survival, toxicity and the efficacy of salvage therapy were evaluated in all patients. The median follow-up time was 111 months and permitted an assessment of the long-term effects of treatment and natural history of a cohort of treated patients.

RESULTS

EVA achieved a complete response (or clinical complete response) in 48/51 patients (94%). Of these 48 responders, 16 relapsed in a median of 11 months (range 3-48 months). In follow-up, 32/51 patients had no evidence of relapsed HD, although three died from other causes (two from vascular events and one from large cell lymphoma), resulting in progression-free survival for the entire group of 57% at 111 months. Eight of the 16 were alive and free from disease at follow-up at 111 months. In the entire series, only seven patients (14%) died of HD. 37 patients (73%) continued free from disease. There was no pulmonary toxicity.

CONCLUSIONS

The EVA regimen appears to have an overall survival (OS) outcome comparable to ABVD, but without the lung toxicity. The high salvage rate of second-line therapy, in most instances at conventional dosage, suggests an absence of cross-resistance to alkylating agents in patients treated with EVA.

Cyclophosphamide, doxorubicin, vincristine, prednisone, and etoposide (CHOPE) for advanced-stage Hodgkin's disease: CALGB 8856

Successful treatment of advanced-stage Hodgkin's disease (HD) may critically depend on dose intensity. Because mechlorethamine, Oncovin, procarbazine, and prednisone (MOPP), and Adriamycin, bleomycin, vinblastine, and dacarbazine (ABVD) are not suitable for major dose escalation, we evaluated the activity and toxicity of combined cyclophosphamide, doxorubicin, vincristine, prednisone, and etoposide (CHOPE) in advanced HD, here used at conventional dose intensity, as a preparatory study prior to using this regimen at higher dose intensity. Ninety-two patients were treated with CHOPE (cyclophosphamide, 750 mg/m2, day 1; doxorubicin, 50 mg/m2, day 1; vincristine, 1.4 mg/m2, days 1 and 8; prednisone, 100 mg/day, days 1-5; and etoposide, 80 mg/m2, days 1, 2, and 3) every 21 days. All had advanced HD with no prior chemotherapy with 46% stage IV, 63% with B symptoms, and 57% with bulky disease (> 5 cm). Radiation and growth factor support were not permitted. Full-dose vincristine (not capped at maximum 2 mg/dose) was used in the first 33 patients. An initial cohort of 41 patients was treated with four cycles of CHOPE to evaluate safety and efficacy followed by four cycles of ABVD. A second cohort of 51 patients was treated with 6-8 cycles of CHOPE alone. Toxicity was generally acceptable and primarily hematologic, with neutrophils < 500 in 63% of cohort I and 90% of cohort II, and platelets < 25,000 in 7% of cohort I and 8% of cohort II. The long-term neurotoxicity of full-dose, high-intensity vincristine was acceptable and largely reversible. In cohort I, 92% of patients achieved a complete response (CR) or partial response (PR) with four cycles of CHOPE and 85% were in CR after four additional cycles of ABVD. In cohort II, 77% achieved a CR with 6-8 cycles of CHOPE alone. FFS was 76% in cohort I and 59% in cohort II, with a median follow-up of 8.2 and 5.7 years, respectively. CHOPE, at conventional dose intensity as used here, is an effective first-line regimen for the treatment of advanced-stage HD and may warrant evaluation using higher doses of cyclophosphamide and etoposide with granulocyte colony stimulating factor (G-CSF) support.