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Stratification of Atypical Intraepithelial Prostatic Lesions Based on Basal Cell and Architectural Patterns.
American Journal of Clinical Pathology 2020 Februrary 9
OBJECTIVES: High-grade prostatic intraepithelial neoplasia (HPIN) and atypical cribriform lesion of the prostate are considered the precursors or associators of invasive prostate cancer (iPCa). Given loss of basal cells being the hallmark of iPCa, we hypothesized that a subset of these atypical intraepithelial lesions (AILs) with sparse basal cells can be classified as prostatic intraepithelial carcinoma (PIC) with frequent iPCa association and that different morphologic patterns of PIC are associated with specific Gleason (G) patterns and scores for iPCa.
METHODS: We stratified 153 foci of AILs from 110 patients based on the integrity of the basal cell layer and architectural patterns and their association with iPCa.
RESULTS: We demonstrated that AILs could be stratified into usual HPIN (intact basal cell layer and simple patterns) with low-risk of iPCa association and PIC (sparse basal cell layer) with high risk of iPCa association. Furthermore, PIC could be divided into low-grade (simple patterns and associated with G3 and G3/4 iPCa) and high-grade PIC (complex patterns and associated with G4 and G3/4/5 iPCa).
CONCLUSIONS: Such stratification is of great clinical significance and instrumental to clinical patient management. It not only increases the predictability of AILs for iPCa but also accommodates a clinical scenario for lesions with features of intraductal carcinoma when iPCa is not found, particularly in biopsies.
METHODS: We stratified 153 foci of AILs from 110 patients based on the integrity of the basal cell layer and architectural patterns and their association with iPCa.
RESULTS: We demonstrated that AILs could be stratified into usual HPIN (intact basal cell layer and simple patterns) with low-risk of iPCa association and PIC (sparse basal cell layer) with high risk of iPCa association. Furthermore, PIC could be divided into low-grade (simple patterns and associated with G3 and G3/4 iPCa) and high-grade PIC (complex patterns and associated with G4 and G3/4/5 iPCa).
CONCLUSIONS: Such stratification is of great clinical significance and instrumental to clinical patient management. It not only increases the predictability of AILs for iPCa but also accommodates a clinical scenario for lesions with features of intraductal carcinoma when iPCa is not found, particularly in biopsies.
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