Pathology: myoepithelioma-like hyalinizing epithelioid tumour

Lobulated
Loose fascicles of polygonal-spindle cells
Pale eosinophilic cytoplasm
Round-ovoid-reniform with minimal atypia and pin-point nucleoli; inconspicuous mitotic activity
Abundant hyalinized stroma
IHC: CD34
RNA-seq: OGT::FOXO4 gene fusion
PMID: 32649321, 31567281, 33455033

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Soft Tissue Tumours

Tumours of Uncertain Differentiation