PMC5822820_01
Imaging of the fibrous pseudotumor in the scrotum. Scrotal ultrasound revealed a normal testicle and multiple 3 to 7 mm hyperechoic lesions adjacent to the right testis ((a), arrows). Contrast-enhanced computed tomography (CT) showed high-density paratesticular tumors ((b), arrows). Magnetic resonance imaging (MRI) showed iso- and low-intensity paratesticular tumors in T1- ((c), arrows) and T2-weighted MR images ((d), arrows), respectively. Short TI inversion recovery (STIR) MRI showed low-intensity paratesticular tumors ((e), arrows). Water MRI showed high-intensity tumors ((f) and (g), arrows). T1WI: T1-weighted image; T2WI: T2-weighted image.
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fig1
Scrotal ultrasound revealed a normal testicle and multiple 3 to 7 mm hyperechoic lesions adjacent to the right testis (Figure 1(a)). Contrast-enhanced computed tomography (CT) revealed high-density paratesticular tumors (Figure 1(b)). Signa HDxt 1.5T) revealed iso- and low-intensity paratesticular tumors on T1- (Figure 1(c)) and T2-weighted MR images (Figure 1(d)), respectively. Short TI inversion recovery MRI showed low-intensity paratesticular tumors (Figure 1(e)). Water MRI showed high-intensity tumors (Figures 1(f) and 1(g)).
Macro- and microscopic findings of the fibrous pseudotumor. Macroscopic findings showed many paratesticular white pedicle masses (a). We excised the paratesticular white masses (b) and evaluated them via frozen section (scale bar = 1 cm). After it was determined that the masses were not malignant, the tunica vaginalis was excised and they were totally removed. Pathological findings showed the proliferation of typical fibroblasts distributed in multidirectional bundles of dissociated collagen fibers (c). Immunohistochemical staining was negative for D2-40 (mesothelioma, (d)), calretinin (mesothelioma, (e)), beta-catenin (desmoid-type fibromatosis, (f)), and anaplastic lymphoma kinase (ALK and inflammatory myofibroblastic tumor, (g)).
CRIU2018-6904827.002.jpg
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Scrotal incision was performed to explore the scrotum, and paratesticular white pedicle masses were observed (Figure 2(a)). We excised the paratesticular white masses (Figure 2(b)) and successfully performed testicular-sparing surgery. Pathological findings revealed the proliferation of typical fibroblasts that were distributed in multidirectional bundles of dissociated collagen fibers (Figure 2(c)). Immunohistochemical staining was negative for D2-40 (mesothelioma, Figure 2(d)), calretinin (mesothelioma, Figure 2(e)), beta-catenin (desmoid-type fibromatosis, Figure 2(f)), and anaplastic lymphoma kinase (ALK) (inflammatory myofibroblastic tumor, Figure 2(g)).