Fig. 4
From: Desmoid-type fibromatosis of neck masquerading as nerve sheath tumors: two case reports
The histopathological examination reveals that at 4X magnification in the H&E-stained sections (a), there are long, sweeping fascicles of elongated spindle cells within a collagenous stroma (indicated by the arrow). Perivascular edema is also observed (indicated by the arrowhead). At 10X magnification in the H&E-stained sections (b), fascicles of spindle cells are visible within the collagenous stroma (arrow), featuring vesicular nuclei with pinpoint nucleoli (arrowhead). Immunohistochemistry for Smooth Muscle Actin (SMA) exhibits staining in a 'tram-track' pattern (c). Immunohistochemistry for Beta-catenin displays strong nuclear staining (d)