WT1 and neoplasm: Out of these two RCCs, manifesting solely tumor-adjacent renal tissue positivity, one was included in our previous WT1 IHC analysis [45], a 51-year-old male patient with an aggressive and systemically disseminated RCC (svRCC histology, G4, stage 3, pT3a cN1M0), and was negative for WT1 in RCC tumor tissue as well.