Research LetterIn-Press PreviewOncology Open Access | 10.1172/JCI185999 Frameshift mutation spectra overlap between constitutional mismatch repair deficiency tumors and Lynch syndrome tumors 1Vaccine, Immunity and Cancer Directorate, Frederick National Laboratory for Cancer Research, Frederick, United States of America 2Molecular Diagnostics Laboratory, Frederick National Laboratory for Cancer Research, Frederick, United States of America 3Clinical Research Directorate, Frederick National...