Circumscribed; fascicles of spindle cells
Abundant bright eosinophilic cytoplasm with occasional perinuclear vacuoles
Small ovoid nuclei with minimal atypia; inconspicuous mitotic activity
Slit-like vascular channels
Circumscribed; fascicles of spindle cells
Abundant bright eosinophilic cytoplasm with occasional perinuclear vacuoles
Small ovoid nuclei with minimal atypia; inconspicuous mitotic activity
Muscular vascular channels
IHC: H-caldesmon
Fascicles of spindle cells
Abundant bright eosinophilic cytoplasm with occasional perinuclear vacuoles
Small ovoid nuclei with minimal atypia; inconspicuous mitotic activity
IHC: H-caldesmon
Circumscribed; fascicles of spindle cells
Abundant bright eosinophilic cytoplasm with occasional perinuclear vacuoles
Small ovoid nuclei with minimal atypia; inconspicuous mitotic activity
Slit-like vascular channels
IHC: desmin, smooth muscle actin, H-caldesmon
Circumscribed; fascicles of spindle cells
Abundant bright eosinophilic cytoplasm with occasional perinuclear vacuoles
Small ovoid nuclei with minimal atypia; inconspicuous mitotic activity
Slit-like vascular channels; focal dystrophic calcification
IHC: H-caldesmon
Interwoven fascicles of spindle cells
Abundant bright eosinophilic cytoplasm with occasional perinuclear vacuoles
Small ovoid nuclei with minimal atypia; inconspicuous mitotic activity
Thick muscular vascular channels
IHC: H-caldesmon