Fig. 5

Interphase zone with an inflammation-rich pseudovascular area (*) and a fibrous and sclerosing component (&) (a). Fibrous neoplastic tissue with sparse epithelioid cells within the lymphoplasmacytic infiltrate (b). Vessel surrounded by lymphoplasmacytic cells in the fibrosclerotic region (c). Detail of a neoplastic cell: eosinophilic cytoplasm with distinct nucleoli next to lymphocytes and plasma cells (arrow) (d). Cytoplasmic positivity for MelanA in a single cell in the fibrosclerotic region (circle) (e)