case_images: PMC9753946_01
case_images: Gross examination revealed (A) a skin-covered soft tissue mass and (B) homogenous greyish white glistening areas on the cut section.
case_images: toj-22-0004-figure1.jpg
case_images: PMC9753946_01_toj-22-0004-figure1.jpg
case_images: f1
case_images: No heterogenous areas were identified (Figure 1).
case_images: Solitary fibrous tumor shows a proliferation of spindle cells without a characteristic pattern and hemangiopericytoma vascular pattern with (A) hematoxylin and eosin (H&E) stain, magnification x10, (B) H&E stain, magnification x40, (C) diffuse membranous immunohistochemical staining of CD34 (magnification x10), and (D) strong diffuse nuclear immunohistochemical staining of STAT6 (magnification x10).
case_images: toj-22-0004-figure2.jpg
case_images: PMC9753946_01_toj-22-0004-figure2.jpg
case_images: f2
case_images: On microscopic examination, a predominantly well-circumscribed encapsulated tumor was noted, with spindle-shaped cells arranged in a haphazard manner and ectatic vascular channels (Figures 2A and 2B). Immunohistochemically, the tumor cells showed strong diffuse positivity for CD34 (Figure 2C) and signal transducer and activator of transcription 6 (STAT6) (Figure 2D).