The invention includes compositions and methods of treatment of cancers susceptible to treatment with nucleotide analog chemotherapeutic agent, including cancers in which nucleotide analog resistant tumors have developed, including identifying a subject having cancer susceptible to treatment with a nucleotide analog chemotherapeutic agent and a mitotic disruptor/polo-like kinase (Plk) pathway inhibitor to a subject and monitoring the subject for a reduction or stabilization of at least one sign or symptom of cancer.
