Pathology: plexiform myofibroblastoma

Plexiform; spindle cells with a storiform-fascicular pattern
Pale and amphophilic cytoplasm with ill-defined cell borders
Ovoid nuclei with vesicular chromatin, visible nucleoli, and mild pleomorphism; rare mitotic activity
Areas of keloid-like collagen
IHC: smooth muscle actin
PMID: 32618598

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Soft Tissue Tumours

Fibroblastic & Myofibroblastic Tumours