A Rare Case of Metastatic Glioblastoma Diagnosed by Endobronchial Ultrasound-Transbronchial Needle Aspiration

Figure 4

GFAP is immunoreactive in the tumor cells (a). (b) Strong positivity for synaptophysin. S100 protein immunostain demonstrates strong and diffuse positivity (c). Keratin is negative (not shown).

(a)

(b)

(c)