KRT19 and neoplasm: In terms of tumor markers, the Carcinoembryonic antigen (CEA) positivity rate was 55.6% within the range of 0.48 - 370.3 ng/mL, the neuron-specific enolase (NSE) positivity rate was 33.3% in the range of 9.99 - 23.46 ng/mL, and the cytokeratin 19 fragment (CYFRA211) positivity rate was 72.2% wide (1.53 - 130 ng/mL).