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Discover 17,526 clinical trials near North Carolina. Find research studies in your area.
Showing 13221-13240 of 17,526 trials
NCT01751529
This prospective pilot study is designed to evaluate the accuracy of contrast-enhanced ultrasound when used to evaluate renal lesions in two different populations; patients with known renal tumors (Cohort 1) and patients with a risk factor for renal malignancy in whom their screening ultrasound shows an indeterminate or possibly malignant renal mass (Cohort 2).
NCT00153816
Extensive experimental and observational data suggest that intake of calcium and of vitamin D exert protective effects on colorectal neoplasia. Building on their previous work, the investigators will investigate the chemopreventive effect of vitamin D in the large bowel, to study whether calcium with vitamin D is more effective than calcium alone, and to confirm their positive finding regarding calcium. The goal of this study is the development of chemopreventive combinations that will reduce risk of colorectal neoplasia sufficiently to permit the lengthening of surveillance intervals in most patients and to clarify important issues regarding the mechanisms of colorectal carcinogenesis and chemoprevention.