Hypocellular spindle-stellate cell fascicles, with admixed adipocytes
Spindle-stellate cells have eosinophilic cytoplasm with delicate processes; nuclei are ovoid and hyperchromatic with moderate pleomorphism
Adipocytes have abundant clear cytoplasm with frequent multivacuolation; nuclei are hyperchromatic and scalloped, with moderate pleomorphism
Interspersed there is abundant myxoid stroma; prominent arcing and thick-walled vasculature
IHC: CD34
FISH: MDM2 non-amplified; RNA-seq: negative
Variably cellular sheets of stellate-polygonal cells, with admixed adipocytes
Stellate-polygonal cells have eosinophilic cytoplasm with delicate processes; nuclei are round-ovoid and hyperchromatic with moderate pleomorphism
Adipocytes are variably sized with abundant clear cytoplasm and frequent muclevacuolation; nuclei are hyperchromatic and scalloped, with moderate pleomorphism
Interspersed there is abundant myxoid stroma with a delicate arborizing vasculature
FISH: MDM2 non-amplified; RNA-seq: negative