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DOI: 10.1148/rg.24si035223
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Right arrow Genitourinary Radiology

Epidermoid Cyst of the Testis: Radiologic-Pathologic Correlation1

Alma G. Loya, MD, Jonathan W. Said, MD and Edward G. Grant, MD

1 From the Department of Radiology, University of California at Los Angeles. Received December 10, 2003; revision requested January 14, 2004; final revision received April 12; accepted April 19. All authors have no financial relationships to disclose. Address correspondence to E.G.G., USC University Hospital, 1500 San Pablo St, 2nd Fl Imaging, Los Angeles, CA 90033 (e-mail: edgrant@usc.edu).



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  		Figure 1a.  Longitudinal (a) and transverse (b) US images of the right testis show a well-circumscribed intratesticular mass (cursors) in the lower medial aspect of the testis. The mass contains alternating rings of hyperechogenicity and hypoechogenicity and has a slightly echogenic center. The surrounding testis is normal.

 


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  		Figure 1b.  Longitudinal (a) and transverse (b) US images of the right testis show a well-circumscribed intratesticular mass (cursors) in the lower medial aspect of the testis. The mass contains alternating rings of hyperechogenicity and hypoechogenicity and has a slightly echogenic center. The surrounding testis is normal.

 


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  		Figure 2.  Photograph of the sectioned surgical specimen shows a smooth white mass with laminated white-yellow pastelike material, a finding that correlates well with the US findings (cf Fig 1).

 


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  		Figure 3a.  (a) Low-power photomicrograph (original magnification, x80; hematoxylin-eosin stain) shows normal testis (T) and an epidermoid cyst (C). The cyst wall contains keratinized squamous epithelium (E). The lumen of the cyst contains keratinized debris (arrow). A few atrophic testicular tubules are present (arrowheads). (b) Higher-power photomicrograph (original magnification, x130; hematoxylin-eosin stain) shows hyperkeratotic squamous epithelium (E) lining the cyst.

 


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  		Figure 3b.  (a) Low-power photomicrograph (original magnification, x80; hematoxylin-eosin stain) shows normal testis (T) and an epidermoid cyst (C). The cyst wall contains keratinized squamous epithelium (E). The lumen of the cyst contains keratinized debris (arrow). A few atrophic testicular tubules are present (arrowheads). (b) Higher-power photomicrograph (original magnification, x130; hematoxylin-eosin stain) shows hyperkeratotic squamous epithelium (E) lining the cyst.

 




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