Histological images of iPCa. a HoLEP: benign histology (hematoxylin/eosin staining, magnification ×40). b Aquablation: benign histology (hematoxylin/eosin staining, magnification ×40). c HoLEP: iPCa, Gleason score 6 = 3 + 3 (hematoxylin/eosin staining, magnification ×100). d HoLEP: iPCa, Gleason score 7a = 3 + 4 (hematoxylin/eosin staining, magnification ×20). e Aquablation: iPCa, Gleason score 8 = 4 + 4 (hematoxylin/eosin staining, magnification ×200). f Aquablation: iPCa, Gleason score 8 = 4 + 4 (PSAP immunohistochemistry, magnification ×200).