Photomicrographs of the pathological specimen. Case 1: (A) 40 × magnification photomicrograph delineating the overall view, hematoxylin and eosin (H&E). Loose arraying spindle cells riddled with irregular vascular spaces, some containing blood. (B) 40 × magnification immunohistochemistry of smooth muscle actin (SMA), the spindle cells were strongly positive for SMA as shown by the brown color. Case 2: (C) 40 × magnification photomicrograph, H&E, showed the interface between the tumor and dura. (D) 40 × magnification with immunostaining for SMA, whorls of spindle cells were positive for SMA, showing brown. Case 3: (E) 100 × magnification photomicrograph (H&E) illustrated that the tumor was composed of smooth muscle cells and vessels. (F) 40 × magnification photomicrograph of the immunohistochemistry of CD34 showed a selected stain of the single layer of endothelium lining the channels, shown by the brown color. The arrow points to the adjacent dura matter.