Figure 2. A– whorls meningothelial elements with massive infiltration of inflammatory cells (H&E); B – Progesterone Receptor (PgR) immunohistochemical staining: an intense nuclear pattern is expressed in meningothelial cells; C – CD68/PG-M1 immunohistochemical staining: an intense and diffuse granular pattern is expressed in histiocytes; D – PDL-1 immunohistochemical staining: an intense cytoplasmatic and membranous positivity in the meningeal tumoral component. Scale bars: 400 µm (A-C-D), 200 µm (B).
