Polypoid; elongated polygonal cells with a patternless distribution
Eosinophilic cytoplasm with prominent cross-striations
Peripheral ovoid nuclei with macronucleoli and minimal atypia; frequent multinucleation; inconspicuous mitotic activity
Interspersed loose fibrous stroma with occasional thin-walled vessels
RNA-seq: negative
PMID: 28700439
Polypoid; sheets of polygonal cells
Abundant eosinophilic cytoplasm with prominent cross-striations
Peripheral round nuclei with macronucleoli and minimal atypia; occasional multinucleation; inconspicuous mitotic activity
Occasional ectatic thin-walled vessels
RNA-seq: negative