Histological and Clinical Characteristics of Oral Squamous Cell Carcinoma Analyzed by Digitally Assembled Whole‐Mount Sections

In the cross-sectional analysis, 17 cases (41.5%) consisted of only WDMD, and the PD component was predominant in seven cases (17.1%). In the remaining 17 patients, the PD component was partial (< 50%). When grouping noncancerous lesions (benign-looking epithelium and dysplasia, BnDy) and cancerous lesions (carcinoma and ulceration, CaUl) in the surface analysis, the proportion of CaUl was significantly lower in the tongue than in other oral sites (p = 0.009) In the survival analysis, although not statistically significant, the overall survival of partial PD patients was more similar to that of the predominant PD group compared to that of the WDMD-only group.