Microscopic tumor characteristics. (A) Proliferation of atypical short spindle or oval cells resembling high grade undifferentiated sarcoma. (B) Proliferating spindle cells containing elongated, blunt-ended nuclei and eosinophilic fibrillar cytoplasm with scattered enlarged and irregular nuclei. (C) The presence of a WDL component, showing mature-appearing adipose tissue and fibrous bands with irregular nuclei.
Hatanaka et al. Diagnostic Pathology 2013 8:142 doi:10.1186/1746-1596-8-142