Desmoglin 3 (DSG3) is often highly expressed in various squamous cell carcinomas (SqCC). In studies of lung SqCC, DSG3 has demonstrated a sensitivity of 85-99% and an ability to discriminate lung adenocarcinoma with a specificity of 98-100%. Numerous studies have shown CK5/6 to be a sensitive marker for lung SqCC. Two sudies using a cocktail of DSG3 + CK5 antibody reported sensitivities of 93% and 100% for lung SqCC, with a specificity of 100% vs. lung adenocarcinoma. Studies have also shown that a DSG3 and CK5 cocktail provides superior sensitivity and specificity, compared to alternative markers for lung SqCC.
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