Fig. 2

Prostate tissue digital section. A: a The area delineated by the red line is a prostate cancer lesion; the distance between the edges of the two cancer lesion is > 3 mm, which means they do not belong to the same tumor; b The area delineated by the red line is a prostate cancer lesion, and the distance between the two edges is < 3 mm, which means they belongs to the same tumor. B: a and b are the digital slices of the prostate tissue at adjacent layers in the vertical direction. The area delineated by the red line is the prostate cancer lesion. The projections of the cancer lesion on the two layers belong to the same tumor