Epithelioid sarcoma: can be keratin+, TLE1+ (30%) and have spindle cell morphology; CD34+ (50%) and INI1 lost in majority. Biphenotypic sinonasal sarcoma: has neural and myogenic IHC markers, including S100 and SMA, calponin, desmin or myogenin; PAX3 rearrangements by FISH.