Figure 3

Histopathological examination of lung metastasis. (A) Photomicrograph of lung specimen revealing meningioma cells with increased cellularity (H & E 40×). (B) Under higher magnification, cellular pleomorphism, nuclear atypia, and necrotic foci were observed (H & E 400×). (C) Epithelial membrane antigen staining was positive (400×). (D) Moderate Ki-67 proliferation index (>10%, 400×).