Figure 1. Microscopic examination of the pseudomyogenic hemangioendothelioma. A) H&E-stained section showing a tumor with a spindle cell lesion without atypia, ×20. B) H&E-stained section, ×40. C) Immunoexpression of cytokeratin AE1/AE3, ×20. D) Immunoexpression of ERG, ×20, E) Immunoexpression of CD31, ×20. F) Immunoexpression of FOSB showing strong nuclear positivity, ×20.