Figure 1: Representative images of immunohistochemical staining using mAb SKM9-2 in various histologic subtypes of MM or non-neoplastic tissues.

(a) Immunostaining of various MPM samples. An enlarged image is shown on the upper right side. In biphasic MPM, epithelioid components or sarcomatoid components are indicated with the arrow of E or the arrow of S, respectively. Scale bars, 50 μm. (b) Immunostaining of rare mesothelioma and MPM cells in pleural effusion. Scale bars, 50 μm. (c) Immunostaining of non-neoplastic tissues. In positive cases, an enlarged image is shown on the upper right side. The positive cells are indicated by arrows. Capillary endothelium was partially stained in the angiogenesis around a tumor (arrow in the right bottom image). Scale bars, 100 μm.