PMC5107861_01
Abdominal/pelvic CT scan image demonstrating (a) a solid, lobed, well-circumscribed mass (arrow) compressing the rectum (arrowhead) and the posterior wall of the urinary bladder (white star) and (b) the distal part of the left ureter (double arrow) between the mass and the bladder wall.
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The urinary bladder wall was normal and the distal part of the left ureter crossed between the mass and the bladder wall (Figure 1).
(a) T1-weighted axial MRI image demonstrating a fusiform, lobed, well-circumscribed, hypointense lesion (arrow) with regular borders, compressing the rectum (arrowhead) and the posterior wall of the urinary bladder (white star). (b) T2-weighted axial MRI image showing the lesion having hyperintense signal and containing thin septa. (c) T1-weighted postcontrast axial MRI demonstrating heterogeneous enhancement of the lesion's lobules after intravenous administration of paramagnetic contrast agent.
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T1-weighted sequences and contained thin septa. The adipose tissue around the lesion was not infiltrated. There was heterogeneous enhancement of the lesion's lobules after intravenous administration of paramagnetic contrast agent (Figure 2).
The surgical specimen. The prostate, 5 x 3.8 x 3.5 cm in size (arrow), the right seminal vesicle (arrowhead), and the tumor, 7 x 6.5 x 5.7 cm in size, which invaded the left prostatic lobe (white star).
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Macroscopic examination revealed a tan-gray mass, 7 x 6.5 x 5.7 cm in diameter, which invaded the posterior part of the left prostatic lobe (Figure 3).
Histological images: (a) intense nuclear atypia (hematoxylin and eosin stain, x100), (b) Verocay bodies (hematoxylin and eosin stain, x100), (c) immunohistochemical reaction for S-100, and (d) immunohistochemical reaction for vimentin.
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The neoplastic population was immunohistochemically positive for S-100 and vimentin (Figure 4).