A gel, made from a horse chestnut extract, may improve the imaging of tumors, including prostate cancer, using radioactive tracer molecules. A research team now hopes that, using the gel, it will be possible to develop a skin cream that might improve cancer detection in the clinic. The team — led by Dr. George John, a professor in the Division of Science at City College of New York, and Dr. Jan Grimm, a physician-scientist at Sloan Kettering Institute and the Memorial Sloan Kettering Cancer Center — published their findings in the journal ACS Applied Materials & Interfaces.