Figure 2.
Histopathology of Fibromatosis Cases.
A: Low magnification shows paucicellular spindle cell proliferation composed of fibroblastic cells embedded in a collagenous stroma. B: Fibroblastic proliferation infiltrating skeletal muscle cells (black arrow). C: Higher magnification shows spindle cells with elongated nuclei, pale nuclear chromatin, and inconspicuous nucleoli in a collagenous stroma. D: Spindle cells show strong and diffuse nuclear beta-catenin.