Abstract:2555 Background: Given the activity of immune checkpoint inhibitors (ICI) in mismatch repair deficient tumors, we evaluated if homologous recombination repair deficiency associates with solid tumor response to ICI. Methods: We conducted a phase 2 trial (NCT03274661) of PEM in metastatic solid tumor patients progressing on standard of care and for whom PEM had no FDA approved indication. We evaluated a triple stain (FANCD2foci/DAPI/Ki67) immunofluorescence functional assay of the Fanconi Anemia pathway (FATSI)… Show more
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