http://www.cancer.gov/search/clinical_trials/

Database which includes approximately 1,700 abstracts of trials that are open and approved for patient accrual, including trials for cancer treatment, diagnosis, supportive care, screening, and prevention. For each trial, abstracts are prepared from the original protocol document. Clinical trials may be searched by diagnosis, treatment modality, phase, stage, locality, drug name, or a combination of these and other variables.