Case of the Week - Patient Summary 11108Peer Reviewed and Certified -
• hypoechoic mass
• lamellated appearance
• Sertoli tumor
• Epidermoid
• Varicocele
Epidermoid Cyst of the Testis Etiology is unknown, but they are believed to be a form of teratoma with monodermal development of the ectoderm. Alternately, they may be embryonic inclusion cysts.
Typically presentation is a discrete palpable nodule within the testis. Patient may or may not have symptoms of epididymitis.
On gross examination, there is a well-circumscribed cyst filled with flaky or lumpy yellow-white material.
Histologically, stratified squamous epithelium, dense fibrous tissue wall, focal calcifications, and acellular keratotic debris may be seen.
Sonographically, they are seen as a well-circumscribed hypoechoic mass with internal echoes or an onion-skin lamellated appearance. They should not demonstrate increased vascularity.
On MRI, reported findings include low intensity rim surrounding a higher intensity ring surrounding a central area of low intensity (T1 and T2) or alternating concentric rings of low and high intensity (T1 and T2).
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