Pathology: superficial CD34-positive fibroblastic tumour

 Relatively circumscribed; vague fascicles of spindle-epithelioid cells

Abundant 'glassy' eosinophilic cytoplasm

Ovoid nuclei with marked pleomorphism and occasional macro-nucleoli; atypical mitotic figure

Collagenous stroma with intermixed adipocytes and chronic inflammation

IHC: CD34

RNA-seq: negative

Relatively circumscribed; fascicles of spindle-epithelioid cells

Abundant "glassy" eosinophilic cytoplasm

Ovoid nuclei with moderate pleomorphism, occasional pseudonuclear inclusions and macronucleoli; inconspicuous mitotic activity

Focal bands of collagenous stroma; mild chronic inflammatory infiltrate

IHC: CD34, keratin (AE1/AE3)

RNA-seq: negative