Circumscribed; spindle cells in short fascicles
Fibrillary eosinophilic cytoplasm
Monomorphic ovoid-elongated nuclei with areas of palisading; inconspicuous mitotic activity
Prominent interstitial haemorrhage and haemosiderin deposition; so-called "amianthoid" fibres (hyalinized collagenous bodies) with focal calcium deposition; lymphocytic cuff
IHC: smooth muscle actin
PMID: 25025452
Spindle cells in short fascicles
Fibrillary eosinophilic cytoplasm
Monomorphic ovoid-elongated nuclei with areas of palisading; inconspicuous mitotic activity
So-called "amianthoid" fibres (hyalinized collagenous bodies); lymphocytic cuff at end of core
IHC: smooth muscle actin
PMID: 25025452