Alternatively, Ishii et al. [61] estimated the diagnostic values of five lung peripheral biomarkers including SP-A, SP-D, KL-6 and two tumour markers in discriminating patients with ILD of various histopathologic patterns such as usual interstitial pneumonia (UIP) and non-specific interstitial pneumonia (NSIP). The gene discussed is MUC1; the disease is idiopathic pulmonary fibrosis.