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Evaluation of human papillomavirus (HPV) prediction using the International Endocervical Adenocarcinoma Criteria and Classification system, compared to p16 immunohistochemistry and HPV RNA in-situ hybridization

Journal of Pathology and Translational Medicine 2020년 54권 6호 p.480 ~ 488
Ren Hezhen, Pors Jennifer, Chow Christine, Ta Monica, Stolnicu Simona, Soslow Robert, Huntsman David, Hoang Lynn,
소속 상세정보
 ( Ren Hezhen ) - University of British Columbia Department of Pathology and Laboratory Medicine
 ( Pors Jennifer ) - University of British Columbia Department of Pathology and Laboratory Medicine
 ( Chow Christine ) - Genetic Pathology Evaluation Center
 ( Ta Monica ) - Genetic Pathology Evaluation Center
 ( Stolnicu Simona ) - University of Medicine, Pharmacy, Sciences and Technology of Targu Mures Department of Pathology
 ( Soslow Robert ) - Memorial Sloan Kettering Cancer Center Department of Pathology
 ( Huntsman David ) - University of British Columbia Department of Pathology and Laboratory Medicine
 ( Hoang Lynn ) - University of British Columbia Department of Pathology and Laboratory Medicine

Abstract


Background: The International Endocervical Adenocarcinoma Criteria and Classification (IECC) separated endocervical adenocarcinomas into human papillomavirus (HPV) associated (HPVA) and non?HPV-associated (NHPVA) categories by morphology alone. Our primary objective was to assess the accuracy of HPV prediction by the IECC system compared to p16 immunohistochemistry and HPV RNA in-situ hybridization (RISH). Our secondary goal was to directly compare p16 and HPV RISH concordance.

Methods: Cases were classified by IECC and stained for p16 and HPV RISH on tissue microarray, with discordant p16/HPV RISH cases re-stained on whole tissue sections. Remaining discordant cases (p16/HPV, IECC/p16, IECC/HPV discordances) were re-reviewed by the original pathologists (n = 3) and external expert pathologists (n = 2) blinded to the p16 and HPV RISH results. Final IECC diagnosis was assigned upon independent agreement between all reviewers.

Results: One hundred and eleven endocervical adenocarcinomas were classified originally into 94 HPVA and 17 NHPVA cases. p16 and HPV RISH was concordant in 108/111 cases (97%) independent of the IECC. HPV RISH and p16 was concordant with IECC in 103/111 (93%) and 106/111 (95%), respectively. After expert review, concordance improved to 107/111 (96%) for HPV RISH. After review of the eight discordant cases, one remained as HPVA, four were reclassified to NHPVA from HPVA, two were unclassifiable, and one possibly represented a mixed usual and gastric-type adenocarcinoma.

Conclusions: p16 and HPV RISH have excellent concordance in endocervical adenocarcinomas, and IECC can predict HPV status in most cases. Focal apical mitoses and apoptotic debris on original review led to the misclassification of several NHPVA as HPVA.

키워드

p16; Human papillomavirus; Immunohistochemistry; In-situ hybridization; Cervix; Adenocarcinoma; International Endocervical Adenocarcinoma Criteria and Classification; IECC

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