Fig. 3

Pathological findings of hepatic AML. a Hematoxylin and eosin staining showed atypical epithelioid cells containing clear to eosinophilic granular cytoplasm and pleomorphic nuclei (original magnification ×400). b Immunohistochemical staining was negative for HepPar 1 (original magnification ×200), c scatteredly positive for HMB-45 (original magnification ×200), d inconspicuous for SMA (original magnification ×200), and e negative for c-kit (mast cells were expressing c-kit; original magnification ×400). f The Ki-67 labeling index was 12.9 % (original magnification ×200)