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Examples of tumor and PeriT areas in histological sections of OTSCC
(A) H&E and (B) Masson’s trichrome images (×20 magnification) of representative OTSCC sections showing the tumor areas (white arrows) and the PeriT stroma (white asterisks) at the tumor front in stages I (S-I), II (S-II), III (S-III), and IV (S-IV). A total of 70 histologic images (two for each biopsy) were investigated. Scale bars: 200 μm.
