Abstract
The diagnostic value of the water-soluble cytokeratin 19 fragment CYFRA 21-1 in lung cancer was assessed in comparison with carcinoembryonic antigen, squamous cell carcinoma antigen, and neuron-specific enolase. The cut-off value, defined as 95% specificity versus a group of 526 patients suffering from benign chest diseases, was set at 3.3 micrograms/l for cytokeratin 19 fragment CYFRA 21-1 (carcinoembryonic antigen: 7.8 micrograms/l, squamous cell carcinoma antigen: 1.9 micrograms/l, neuron-specific enolase: 13.7 micrograms/l). Elevated pretreatment cytokeratin 19 fragment CYFRA 21-1 concentrations were recorded: in 112 of 244 (46%) patients with all histological types of lung cancer (carcinoembryonic antigen: 32%, squamous cell carcinoma antigen: 25%, neuron-specific enolase: 28%), in 89 of 177 (50%) patients with non-small cell lung cancer (carcinoembryonic antigen: 33%, squamous cell carcinoma antigen: 24%, neuron-specific enolase: 12%), in 47 of 81 (58%) patients with squamous cell carcinoma (carcinoembryonic antigen: 23%, squamous cell carcinoma antigen: 32%, neuron-specific enolase: 14%), in 27 of 63 (42%) patients with adenocarcinoma (carcinoembryonic antigen: 44%, squamous cell carcinoma antigen: 14%, neuron-specific e...Continue Reading
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