- Prior treatment with chemotherapy or immunotherapy within 14 days prior to enrollment. Subjects receiving palliative radiation to CNS disease within 7 days may be eligible with PI approval. If the most recent treatment line is an EGFR-TKI, the washout period is a minimum of 3 days before the start of paclitaxel/selumetinib (i.e. treatment with the EGFR-TKI may continue until 3 days before start of study treatment). For other targeted therapy agents, the washout period will be 5 half-lives, prior to start of treatment on study.