With regard to the expression of APN/CD13, Yi Yang and colleagues reported on the use of the 68Ga-labelled dimeric cNGR peptide DOTA-c(NGR)2 [DOTA, 1,4,7,10-tetraazacyclododecane-N,N′,N′′,N′′′-tetraacetic acid] for the micro-PET imaging of ovarian cancer xenografts. The gene discussed is ANPEP; the disease is ovarian cancer.