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. Author manuscript; available in PMC: 2014 May 1.

Published in final edited form as: Am J Surg Pathol. 2013 May;37(5):710–718. doi: 10.1097/PAS.0b013e3182772bba

All tumors showed a solid sheet-like growth of uniformly sized ovoid to spindled or histiocytoid cells with palely eosinophilic syncytial cytoplasm (3a); most tumors showed no mitotic activity. Nuclei were vesicular with fine chromatin and smooth nuclear contours and had small or inconspicuous nucleoli, with minimal to no atypia (3b). Focally fascicular growth was observed in only one tumor (3c).

All tumors showed a solid sheet-like growth of uniformly sized ovoid to spindled or histiocytoid cells with palely eosinophilic syncytial cytoplasm (3a); most tumors showed no mitotic activity. Nuclei were vesicular with fine chromatin and smooth nuclear contours and had small or inconspicuous nucleoli, with minimal to no atypia (3b). Focally fascicular growth was observed in only one tumor (3c).