Intrascrotal Testicular and Extratesticular Epidermoid Cysts: About Two Cases

Abstract

Painless solid testicular masses on ultrasonography are commonly malignant. However, if the lesion is well demarcated, rounded, and hypoechoic with alternating hyperechoic and hypoechoic layers, and no internal vascular flow, the possibility of an epidermoid cyst should be considered. Epidermoid cysts are uncommon benign testicular lesions and are extremely rare in the intrascrotal extratesticular region. Including these cysts in the differential diagnosis may allow the urologist to perform testis-sparing surgery.Teaching Point: The possibility of an epidermoid cyst should be considered when a scrotal mass shows an 'onion ring' appearance on sonography and no vascularity on Doppler.

Scrotal epidermoid cysts penetrating the penile corpora cavernosa: Two case reports

“…Epidermoid cysts are benign, well‐circumscribed tumors of germ‐cell origin that represent approximately 1% of all testicular tumors. Reports of intrascrotal extratesticular epidermoid cysts are rare, 3 often occurring in the midline of the perineum. Insufficient scrotal suturing or congenital stray epidermis are thought to cause epidermoid cysts.…”

“… 2 The origin of epidermoid cysts in the ovaries or testes remains unknown; however, they are believed to be monolayer teratomas arising from germ cells. 2 Epidermoid cysts rarely occur in intrascrotal extratesticular tissues 3 ; the frequency of the occurrence is unknown.…”