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Serum cancer from lung-6: Promising biomarker to differentiate cpfe from ipf

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Background: Combined pulmonary fibrosis and emphysema (CPFE) has been recognised as a phe-notype of pulmonary fibrosis. We aimed to compare serum surfactant protein-A (SP-A), surfactant protein-D (SP-D) and Krebs von den Lungen-6 (KL-6) levels, functional parameters, in CPFE and IPF (idiopathic pul-monary fibrosis) patients. Methods: Patients diagnosed with ???CPFE??? and ???IPF??? were consecutively included in 6 months as two groups. The patients with connective tissue diseases are excluded. Results: In this study, 47 patients (41 males, 6 females) with CPFE (n = 21) and IPF (n = 26) with a mean age of 70.12 ?? 8.75 were evaluated. CPFE patients were older, had more intense smoking history, had lower DLCO/VA, lower FVC, and worse six-minute walking distance than the IPF group (p=0.005, p=0.027, p=0.02, p<0.001, p=0.001, respec-tively). Serum KL-6 levels were higher in CPFE group compared to IPF group [264.70 U/ml (228.90-786) vs 233.60 (101.8-425.4), p<0.001]. Serum KL-6 levels of 245.4 U/ml and higher have 81% sensitivity and 73% specificity for the discrimination of CPFE from IPF. Conclusions: Our study has shown that serum KL-6 level is a promising biomarker to differentiate CPFE from IPF. In CPFE cases respiratory and functional parameters are worse than those of pure fibrosis cases.

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Idiopathic pulmonary-fibrosis, Surfactant protein-a, Quality-of-life, Circulating kl-6, Emphysema, Hypertension, Markers, Combined pulmonary fibrosis emphysema, Idiopathic pulmonary fibrosis, Krebs von den lungen-6, Surfactant protein-a, Surfactant protein-d, Pulmonary function tests, Echocardiography, Science & technology, Life sciences & biomedicine, Respiratory system

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