Treatment of solid Gardner lymphosarcoma with methotrexate sorbed on 2-hydroxyethylmethacrylate polymer in combination with leukovorin.

Implantation of 2-hydroxyethylmethacrylate microporous carrier with sorbed methotrexate (Hema-Hex-MTX) proved more toxic on C3H strain mice with a solid Gardner lymphosarcoma than on tumor-free mice of the same strain. If, during the first week of the experimental disease, the Hema-Hex-MTX implantation was followed by administration of leukovorin in course of next 24 hours the toxicity of MTX was abolished and the treated mice survived significantly longer than control animals.