KRT1 and neoplasm: Regarding CKs in both tumours, the teratoma showed a broad expression for different CKs (CK 1,2,3,4,8,14,15,16,17,19,20), while the CK-labelling of the epithelial cells in the teratocarcinoma showed no immunoreactivity to MNF116, suggesting a slightly reduced expression of CKs (CK 1,2,3,4,8,14,15,16,20).