Figure 2. Hematoxylin-eosin staining of EA. The tumor consisted of large epithelioid cells with that were round to polygonal. It had central to eccentrically placed nuclei containing prominent nucleoli. The chromatin was peripherally marginated within the nucleus. The cells were basically arranged in sheets. Mitotic figures, including abnormal mitoses, were frequently seen (A: original magnification ×100; B–D: original magnification ×400).