High-Dose Methotrexate in Combination Chemotherapy for Small Cell Lung Cancer

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Abstract
High-dose methotrexate and Leucovorin (calcium folinate) rescue was evaluated as induction chemotherapy in combination with cyclophosphamide, doxorubicin, and vincristine in 21 patients with extensive-stage small cell lung cancer. Nine (42%) of 21 had a complete remission. The median duration of remission has been short (5 months), and attempts are now under way to improve consolidation chemotherapy. In general, the degree of myelotoxicity was not increased by the high-dose methotrexate, although the antitumor activity of the combination appears enhanced. Attempts at further increasing the intensity of this regimen or comparative trials with other therapy appears warranted.