CLDN10 and idiopathic pulmonary fibrosis: In sharp contrast, Cldn10-positive cells in IPF lungs displayed remarkably pleomorphic cell shapes in various arrangements that include, but are not limited to, columnar in monolayer (area circled by dashed line in Figure 2F, J, K & L; Figure 2N), cuboidal in masses (arrow in Figure 2D; areas circled by dotted lines in Figure 2E, H & K; areas circled by dot-dashed lines in Figure 2F & O), cuboidal in monolayer (designated by asterisks in Figure 2D & G), and cuboidal in randomly scattered pattern (arrowheads in Figure 2M).