Although 30% of mucinous ovarian tumors (n = 104) had IHC performed for CK7, CK20, CDX2, SATB2, and PAX8 in a prior study (4), we were unable to perform this diagnostic panel on all cases and could not confirm whether they were done as part of routine pathologic assessment. This evidence concerns the gene KRT7 and ovarian mucinous neoplasm.