Some tumor sections were immunostained with ready-to-use primary antibodies against broad-spectrum cytokeratin (CK), vimentin, CD117, CK5/6, CK7, P40, P63, paired box gene 8 (PAX8), SRY-related HMG-box 10, thyroid transcription factor-1, CD56, napsin A, synaptophysin, S-100, and Ki-67 (Maixin, Fuzhou, China). Here, KRT7 is linked to neoplasm.