case_images: PMC5697096_01
case_images: Macroscopic appearance of the tumor
case_images: 12907_2017_62_Fig1_HTML.jpg
case_images: PMC5697096_01_12907_2017_62_Fig1_HTML.jpg
case_images: Fig1
case_images: Macroscopically, the mass was well-defined and unencapsulated, it had a yellowish-tan color and a firm consistency (Fig. 1).
case_images: Hematoxilin & eosin (H&E) stain showing a spindle cell proliferation with "hemangiopericytoma like" vascularization and admixed ropy collagen (x100 magnification)
case_images: 12907_2017_62_Fig2_HTML.jpg
case_images: PMC5697096_01_12907_2017_62_Fig2_HTML.jpg
case_images: Fig2
case_images: Microscopic examination showed a well circumscribed proliferation of spindle cells arranged in a "paternless" pattern, with alternating hypo- and hypercellular areas separated by thick, hyalinized collagen with staghorn type vessels (Fig. 2).
case_images: H&E stain showing an area of cellular spindle cell proliferation with mild atypia. Some lymphocytes are observed in the background, mitoses are not apparent (x200 magnification)
case_images: 12907_2017_62_Fig3_HTML.jpg
case_images: PMC5697096_01_12907_2017_62_Fig3_HTML.jpg
case_images: Fig3
case_images: The nuclei showed mild to moderate atypia. (Figure 3).
case_images: CD34 immunostain showing diffuse staining of the tumor cells
case_images: 12907_2017_62_Fig4_HTML.jpg
case_images: PMC5697096_01_12907_2017_62_Fig4_HTML.jpg
case_images: Fig4
case_images: On immunohistochemical studies, tumor cells were positive for CD 34 (Fig. 4) and STAT 6 (Fig. 5).