- CTCL patients may have received one prior course of single-agent systemic chemotherapy for CTCL, but may not have received a multi-agent chemotherapy regimen; patients may have received prior local, topical, radiation- or electron beam-based, or chemotherapy-based treatment; examples of the latter would include, but not be limited to, cytokines such as interferon, retinoids, monoclonal antibodies, and fusion toxins