Cycle 1 Day 1 (C1D1): Patients will have complete history and physical (H&P), complete blood count (CBC), complete metabolic panel (CMP) and electrocardiogram (EKG) on day 1. Each cycle is 28 days. The C1D1 EKG can be omitted if the patient has no new cardiac symptoms and has not starting taking any medication known to affect QT corrected for heart rate (QTc) prolongation. Any residual toxicity from prior therapy for cancer will be recorded. Blood will be drawn for assessment of serum markers. The patient will begin dasatinib at the starting C1D1 on a daily basis.~Cycle 1 Day 10-20 (C1D10-20): Patients will have a second biopsy to obtain additional tumor material to examine biological effects of dasatinib on signaling pathways. Dasatinib will be taken first thing in the morning and the patient will log the time. Blood will also be drawn for pharmacokinetic assessments of dasatinib levels in plasma and the time recorded. Four FNA aspirates and 2 core biopsies can be obtained either at the bedside for palpable lesions or through appropriate image-guided techniques (CT or US) at the discretion of the treating physician in consultation with radiology. The time of the biopsy will be recorded. One core biopsy should be immediately fixed in formalin and the other core biopsy should be snap frozen in liquid nitrogen.~Cycle 2 Day 1 (C2D1): Patients will be seen by the treating physician and have complete H&P, CBC, and CMP. Blood will be drawn for assessment of serum markers. Toxicity of dasatinib will be assessed. The patient will continue to take daily doses of dasatinib on a daily basis.~Cycle 2 Day 22 (C2D22): Patients will undergo reevaluation for tumor measurements. This assessment can occur on C2D22 ±7 days.
The main purpose of this study is to learn how patients with Advanced Non-Small Cell Lung Cancer (NSCLC) respond to the study drug Dasatinib. The study drug, Dasatinib, has been approved by the U.S. Food and Drug Administration (FDA) for treatment of leukemia, but has not been approved for the treatment of other kinds of cancer. The use of Dasatinib in this study is considered experimental.