PMC4732641_01
Low power view of the tumour with interlacing fascicles of spindle cells
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The cells formed short interlacing fascicles, and had slightly wavy nuclei displayed a patchy pattern of palisading (Figure 1).
High power view of the tumour with hemosiderin pigment and lymphoid cell with irregular distribution observed among the spindle cells
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Collagen accumulations were easily recognized as "amianthoid fibers" in some areas (Figure 2).
High power view of the tumour showing short fascicles of spindle cells and amianthoid fibres
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In the peripheral portion of the tumor, reactive lymphoid, hemosiderin-laden macrophages, and extravasated erythrocytes were also noted (Figure 3).
High power view of the tumour showing strong expression of Smooth muscle actin (SMA)
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Immunohistochemical analysis revealed positivity for Smooth muscle actin (SMA) (Figure 4) and negativity for Desmin, S-100 protein, CD117, CD34, cytokeratin, and EMA.