KRT17 and idiopathic pulmonary fibrosis: Furthermore, the disease-enriched presence of basal-like cells (Chilosi et al., 2002; Smirnova et al., 2016; Xu et al., 2017; Prasse et al., 2019) and a novel KRT5-/KRT17+ aberrant basaloid cell population (Adams et al., 2020; Habermann et al., 2020) within the alveolar compartment and in bronchoalveolar lavage (BAL) fluid of IPF patients was described.