Fig. 4From: Left atrial schwannoma in schwannomatosis: a case reportMacroscopical and microscopical findings of the left atrial tumor. Macroscopically, the cut surface of the mass was hard and yellowish in color (a). The spindle-shaped cells constitute a palisading arrangement (b). Immunohistochemically, the tumor cells are positive for S-100 protein (c)Back to article page