Phase II Trial of the Cyclin-Dependent Kinase Inhibitor PD 0332991 in Patients With Cancer

PRIMARY OBJECTIVES: I. To determine the response rates following treatment with PD 0332991 in the following malignancies: 1) Metastatic breast cancer, 2) Metastatic colorectal cancer, 3) Metastatic melanoma with CDK4 mutation or amplification, or 4) Cisplatin-refractory, unresectable germ cell tumors. OUTLINE: Patients receive oral PD 0332991 once daily on days 1-21. Treatment repeats every 28 days for up to 12 courses in the absence of unacceptable toxicity or disease progression.