Fig. 2
From: Desmoid-type fibromatosis of neck masquerading as nerve sheath tumors: two case reports
In histopathological examinations, the following observations are made: At 4X magnification in the Hematoxylin and Eosin (H&E)-stained sections (a), there are fascicles of spindle-shaped cells (indicated by the arrow), along with areas showing microhemorrhages (indicated by the arrowhead). At 10X magnification in the H&E-stained sections (b), the spindle cells are visible with vesicular nuclei and pinpoint nucleoli (arrow) and nearby thin-walled blood vessels (arrowheads). Immunohistochemistry for Smooth Muscle Actin (SMA) reveals focal positivity, presenting a ‘tram-track’ pattern (c). Immunohistochemistry for Beta-catenin exhibits strong nuclear staining (d)