Lobulated; spindle cell fascicles
Scant amphophilic cytoplasm with long tapering processes
Monomorphic ovoid and elongated nuclei; inconspicuous mitotic activity
Collagenous stroma with central hyalinization
IHC: ERG
RNA-seq: EWSR1::SMAD3 gene fusion
Lobulated; spindle cell fascicles
Scant amphophilic cytoplasm with long tapering processes
Monomorphic ovoid and elongated nuclei; inconspicuous mitotic activity
Central hyalinization with necrosis and stippled calcification; peripherally there is focal myxoid stroma
IHC: ERG
RNA-seq: EWSR1::SMAD3 gene fusion
PMID: 29309308, 29957732