Figure 1
From: Positive surgical margins in nephron-sparing surgery: risk factors and therapeutic consequences
Representative microphotographs of positive surgical margin (PSM) in final histopathologic examination. A, overview shows densely packed papillary and tubular structures closely approaching the inked surgical margin (arrows). B, higher magnification of the marked region in A confirms neoplastic tubules reaching the inked surgical margin. Staining: hematoxylin-eosin; scale bar in A: 500 μm; scale bar in B: 100 μm.