PMC3350130_01
Longitudinal scrotal sonogram showing bilateral hypoechoic heterogeneous masses (RT: right testis, LT: left testis).
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The left testis contained three round-to-oval hypoechoic heterogeneous lesions, 0.9-2.3 cm in diameter, located in the mediastinum testis (Figure 1).
T1-weighted magnetic resonance image of the pelvis showing ectopic position of the left testis in front of the left commoun iliac vessels.
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Coronal images of the pelvis confirmed the ectopic position of the left testis, in front of the left common iliac vessels (Figure 2).
Testicular T2-weighted images showing bilateral hyperintense lesions with homogeneous enhancement.
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T1-weighted images and appeared hyperintense on T2-weighted images (Figure 3). They showed a homogeneous enhancement pattern.
Testicular T2-weighted images showing hypointense lesion in the right epididymis, with central areas of high signal intensity.
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In addition, MRI study of the testis showed right epididymal mass exhibiting the following features: isointensity on T1-weighted images, marked enhancement on postcontrast images, and hypointensity on T2-weighted images with central areas of high signal intensity (Figure 4).
High power view of the epididymal tumor showing nests of polygonal cells with abundant granular eosinophilic cytoplasm (H and E, x400). No necrosis or Reinke's crystal is seen.
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Both the lipochrome pigment and crystalloids of Reinke's were lacking (Figure 5).
Immunoperoxidase stain for vimentin showing strong cytoplasmic positivity (IHC, x100).
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Immunohistochemistry showed widespread vimentin and alpha inhibin positivity (Figure 6).