PMC9793056_01
Histopathologic examination of excised lesion. Bland spindle cells with
admixed staghorn vessels in a patternless pattern (x40).
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There was no evidence of necrosis or mitotic activity (Figure 1).
STAT6 immunohistochemical stain with strong nuclear positivity (x40).
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Immunohistochemical staining was performed with spindle cells strongly positive for STAT6 and CD34 while being negative for AE1/AE3, S100, desmin, and smooth muscle actin (Figures 2 and 3).
CD34 immunohistochemical stain with strong positivity in vessels and spindle
cells (x40).
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Immunohistochemical staining was performed with spindle cells strongly positive for STAT6 and CD34 while being negative for AE1/AE3, S100, desmin, and smooth muscle actin (Figures 2 and 3).