ArticleVirchows Archiv : an international journal of pathology2022
5-hmC loss is another useful tool in addition to BAP1 and MTAP immunostains to distinguish diffuse malignant peritoneal mesothelioma from reactive mesothelial hyperplasia in peritoneal cytology cell-blocks and biopsies.
Article in Virchows Archiv : an international journal of pathology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed, 9 citations in OpenAlex.
- Standardized Computer-Assisted Analysis of 5-hmC Immunoreactivity in Dysplastic Nevi and Superficial Spreading Melanomas.International journal of molecular sciences · 2023Article
- Methylthioadenosine Phosphorylase and Breast Cancer 1 Protein-Associated Protein 1 as Biomarkers for the Peritoneal Mesothelioma.Cancer control : journal of the Moffitt Cancer CenterArticle
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8 authors at 2 institutions in 2 countries.
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Abstract
The differentiation between reactive mesothelial hyperplasia (RMH) and diffuse malignant peritoneal mesothelioma (DMPM) is challenging especially when applied on peritoneal small samples. The use of BRCA-associated protein 1 (BAP1) and methylthioadenosine phosphorylase (MTAP) immunostains is familiar to identify malignant mesothelial proliferation. Recently, nuclear 5-hydroxymethylcytosine (5-hmC) was reported to be a new recognition tool of pleural mesothelial malignancy on surgical specimens. However, application of 5-hmC immunostaining has not yet studied in peritoneal specimens from small biopsies or cytology cell-blocks. The aim was to assess the diagnostic accuracy of this new marker combination to distinguish DMPM from RMH in biopsies and cell-blocks. Seventy-five cases were analyzed; among which, 38 were of cytological specimens including 6 RMH and 32 DMPM, and 37 tissue biopsies with 7 RMH and 30 DMPM. BAP1, MTAP, and 5-hmC immunostains were performed on all cases. RMH cases exhibited a retained staining with all immunostains. Among DMPM, BAP1 was lost in 71.8% of cytology cell-blocks and 66.7% of biopsies. MTAP was lost in 40.6% of cytology cell-blocks and 33.3% of biopsies. 5-hmC was lost in 40.6% of cytology cell-blocks and 30% of biopsies. The combination of BAP1, MTAP, and 5-hmC showed the best accuracy in differential diagnosis between RMH and DMPM (sensitivity = 0.84, specificity = 1 in cytology cell-blocks; sensitivity = 0.90, specificity = 1 in biopsy). The best diagnostic combination in peritoneal cytology effusion fluids and biopsies samples provided by BAP1, MTAP, and 5-hmC should be applied on a diagnostic step-wise algorithm by pathologists involved into the management of DMPM, because of their therapeutic implications.
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