ITGAE and neoplasm: PET scans of CHO.CD103 xenograft bearing mice with [68Ga]Ga-hCD103.Fab01A showed an increased tumor uptake compared with the control group (CHO.K1 tumor bearing mice), which was further confirmed by SUVmean quantification (mean xenograft-to-blood ratio: 0.83 vs 0.43, p = 0.057, Fig. 4A, Additional file 3: Fig. S3).