Figure 2 (A–B) Low‐grade non‐invasive neoplasia (NiN): H&E stain (A) shows all the spectrum of the cytohistological lesions of the NiN (altered architecture, atypical/pseudostratified nuclei, loss of superficial differentiation). (B) Mib1 nuclear immunostain is clearly demonstrated throughout the glandular units (from the superficial to the “basal” epithelia; original magnification: ×40).