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. 2021 Jul 9;71(9):604–613. doi: 10.1111/pin.13140

Figure 4.

Figure 4

Fibrous pleuritis (a) with spindle cells showing weak cytoplasmic HEG1 staining (b). Pleural reactive mesothelial proliferation associated with pneumothorax (c) showing strong apical HEG1 staining in reactive mesothelial cells (d)