1. Mismatch repair protein loss in cutaneous head and neck squamous cell carcinoma.
- Author
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Vasan K, Anand S, Satgunaseelan L, Asher R, Low H, Palme CE, Lee JH, Clark JR, and Gupta R
- Subjects
- Aged, Australia epidemiology, Brain Neoplasms metabolism, Brain Neoplasms pathology, Colorectal Neoplasms metabolism, Colorectal Neoplasms pathology, Female, Follow-Up Studies, Humans, Incidence, Male, Neoplastic Syndromes, Hereditary metabolism, Neoplastic Syndromes, Hereditary pathology, Prognosis, Prospective Studies, Retrospective Studies, Survival Rate, Biomarkers, Tumor metabolism, Brain Neoplasms epidemiology, Colorectal Neoplasms epidemiology, DNA Mismatch Repair, DNA Repair Enzymes metabolism, Neoplastic Syndromes, Hereditary epidemiology, Skin Neoplasms complications, Squamous Cell Carcinoma of Head and Neck complications
- Abstract
Background: The treatment of advanced cutaneous head and neck cutaneous squamous cell carcinomas (HNcSCC) results in significant morbidity. Recently, immune checkpoint inhibitor treatment has been approved for DNA mismatch repair (MMR) deficient patients in a histology-agnostic manner. This study aims to evaluate the incidence of MMR deficiency in advanced HNcSCC and its association with clinicopathologic factors., Methods: The cohort included 176 consecutive HNcSCC cases treated with curative intent. Immunohistochemistry for MMR proteins (hMLH1, hMSH2, hMSH6, and hPMS2) was performed. Clinicopathological and survival data was collected prospectively., Results: The incidence of MMR protein deficiency was 9.1%. There was no association between age, incidence of metachronous malignancies, clinicopathological factors, or survival outcomes., Conclusion: A higher incidence of MMR deficiency was observed in this cohort of advanced HNcSCC. The lack of association with young age at onset or increased incidence of metachronous malignancies suggests that MMR deficiency is likely to be sporadic in HNcSCC., (© 2020 Wiley Periodicals LLC.)
- Published
- 2020
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