Journal of Clinical Oncology, Vol 11, 1573-1582, Copyright © 1993 by American Society of Clinical Oncology
EPOCH chemotherapy: toxicity and efficacy in relapsed and refractory non-Hodgkin's lymphoma
WH Wilson, G Bryant, S Bates, A Fojo, RE Wittes, SM Steinberg, DR Kohler, ES Jaffe, J Herdt and BD Cheson
Medicine Branch, National Cancer Institute, Bethesda, MD 20892.
PURPOSE: Based on in vitro evidence that tumor cells are less resistant to
prolonged exposure to low concentrations of the natural product class,
compared with brief higher concentration exposure, we developed a
chemotherapy regimen (etoposide, vincristine, doxorubicin,
cyclophosphamide, and prednisone [EPOCH]) in which the natural products are
administered as a continuous infusion. PATIENTS AND METHODS: This is a
phase II study of etoposide, vincristine, and doxorubicin, administered as
a 96-hour continuous infusion, with intravenous (IV) bolus cyclophosphamide
and oral prednisone (EPOCH) in 74 consecutive patients who relapsed from or
failed to respond to most of the same drugs administered on a bolus
schedule. Patients with aggressive lymphomas who achieved a good response
after EPOCH were eligible to undergo bone marrow transplantation. RESULTS:
Patients with intermediate- or high-grade lymphoma comprised 76% of this
series and 77% had stage IV disease. Seventy-one percent had previously
received all of the drugs contained in the EPOCH regimen and 92% had
received at least four of the drugs. Seventy patients were assessable for
response, of whom 19 (27%) achieved a complete remission (CR) and 42 (60%)
a partial remission (PR). Among 21 patients who had no response to prior
chemotherapy, 15 (71%) responded, but only one achieved a CR. Patients who
relapsed from an initial CR had a 100% response rate, with 76% CRs. With a
median potential follow-up duration of 19 months, there was a 28%
probability of being event-free at 1 year. Toxicity was primarily
hematologic with neutropenia during 51% of cycles, but only a 17% incidence
of febrile neutropenia. Gastrointestinal, neurologic, and cardiac toxicity
were minimal. CONCLUSION: EPOCH chemotherapy was well tolerated and highly
effective in patients who were resistant to or relapsed from the same drugs
administered on a bolus schedule, suggesting that continuous infusion of
the natural drug component of this regimen is capable of partially
reversing drug resistance and reducing toxicity. Dose-intensity (DI) was
> or = that achieved in primary treatment regimens for aggressive
lymphomas.

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