Fig. 3

Histopathological evaluation Haematoxylin-eosin staining at a magnification of ×100 (A). Haematoxylin-eosin staining at a magnification of ×200 (B). Lymphocytes, mesothelial cells, and histiocytes were observed with very few morphologically atypical cells. E-cadherin-positive cells (C). MUC5AC-positive cells (D)