KRT18 and cervical clear cell adenocarcinoma: Furthermore, since hyalinizing clear cell carcinoma (HCCC) is a rare minor salivary gland tumor made up of clear cells and forming cords and nests in a hyalinized stroma (Weinreb 2013), the expressions of genes associated with cervical clear cell adenocarcinoma, such as Krt8, Krt18, and Krt19, and Krt7 showed strong enrichment for columnar cell-specific expression, confirming the major role of these cells in cervical clear cell adenocarcinoma.