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Testicular Epidermoid Cysts

The "Bow Tie" Pattern of Laminated Tumors

University of Nebraska Medical Center, Ultrasound Department, Omaha, Nebraska

Joseph C. Anderson, MD

University of Nebraska Medical Center, Ultrasound Department, Omaha, Nebraska

Kim Michael, BS, RT(R), RDMS, RVT

University of Nebraska Medical Center, Ultrasound Department, Omaha, Nebraska

Jody Berg, MS, RT(R), RDMS

University of Nebraska Medical Center, Ultrasound Department, Omaha, Nebraska

Mohammed F. Quraishi, MD

University of Nebraska Medical Center, Ultrasound Department, Omaha, Nebraska

Testicular epidermoid cysts are benign tumors that represent only 1% of all testicular tumors. This tumor presents as a palpable mass within the testicle. High-resolution sonography can help provide a presurgical diagnosis due to the tumor’s unique sonographic appearance of a "bow tie" echogenicity. This bow tie pattern is formed by the deposition of keratin in layers by the lining of the cyst. A preoperative sonographic diagnosis of a testicular epidermoid cyst can lead to testicle-sparing surgery in healthy, young males due to the benign nature of this tumor.

Key Words: epidermoid cyst • testis • sonography • bow tie • histology • testicular sparing surgery

Journal of Diagnostic Medical Sonography, Vol. 20, No. 3, 162-167 (2004)
DOI: 10.1177/8756479304265488


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