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- W4367299938 abstract "Abstract Background PRAME (PReferentially expressed Antigen in MElanoma) is a tumor‐associated antigen that has been studied in various cutaneous melanocytic lesions. p16, on the other hand, has been proposed to aid in distinguishing between benign and malignant melanocytic neoplasms. Studies on the diagnostic utility of PRAME and p16 in combination in differentiating nevi from melanoma are limited. We aimed to assess the diagnostic utility of PRAME and p16 in melanocytic tumors and their role in distinguishing between malignant melanomas and melanocytic nevi. Methods This is a single‐center retrospective cohort analysis over a 4‐year period (2017–2020). We used the pathological database of malignant melanomas (77 cases) and melanocytic nevi (51 cases) specimens from patients who underwent shave/punch biopsies or surgical excisions and evaluated immunohistochemical staining percentage positivity and intensity for PRAME and p16. Results Most malignant melanomas showed positive/diffuse PRAME expression (89.6%); on the other hand, 96.1% of nevi did not express PRAME diffusely. p16 was expressed consistently in nevi (98.0%). However, p16 expression in malignant melanoma was infrequent in our study. PRAME had a sensitivity and specificity of 89.6% and 96.1%, respectively, for melanomas versus nevi; on the other hand, p16 had a sensitivity and specificity of 98.0% and 28.6%, respectively, for nevi versus melanoma. Also, a PRAME+/p16− melanocytic lesion is unlikely to be a nevus where most nevi were PRAME−/p16+. Conclusion In conclusion, we confirm the potential utility of PRAME and p16 for distinguishing melanocytic nevi from malignant melanomas." @default.
- W4367299938 created "2023-04-29" @default.
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- W4367299938 date "2023-04-27" @default.
- W4367299938 modified "2023-10-17" @default.
- W4367299938 title "Potential diagnostic utility of <scp>PRAME</scp> and p16 immunohistochemistry in melanocytic nevi and malignant melanoma" @default.
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- W4367299938 doi "https://doi.org/10.1111/cup.14438" @default.
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