A Huge Hemorrhagic Epidermoid Cyst of the Perineum with Hypoechoic Semisolid Ultrasonographic Feature Mimicking Scar Endometriosis

Gina Nam, Sa Ra Lee, Hye Rim Eum, Sung Hoon Kim, Hee Dong Chae, Gwang Jun Kim
Medicina (Kaunas, Lithuania) · 2021 · vol. 57(3) , pp. 276 · doi:10.3390/medicina57030276 · PMID:33802800 · PMC8002583 · W3146728738
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⚙ AI-generated summary by claude@2026-06, 2026-06-08 ⓘ

This case study describes a rare, large perineal epidermoid cyst with hypoechoic semisolid ultrasonographic features that mimicked scar endometriosis, emphasizing the need for surgical excision and histopathology for diagnosis.

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Abstract

Epidermoid cysts are small, solitary, and slow-growing lesions that rarely appear in the perineum and mostly arise because of trauma. This study examined a huge perineal epidermoid cyst that slowly grew over eight years in a premenopausal woman. Ultrasonography showed that the hemorrhage in the cyst was a semisolid hypoechoic mass, which mimicked endometrioma, and was tentatively diagnosed as scar endometriosis in the perineum after vaginal delivery. This case study highlights the importance of wide surgical excision and histopathologic diagnosis, even with typical ultrasonography and surgical findings.

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Condition tags

endometriosisendometrioma

MeSH descriptors

Endometriosis Endometriosis Endometriosis Endometriosis Epidermal Cyst Epidermal Cyst Epidermal Cyst Epidermal Cyst Cicatrix Cicatrix Female Humans Perineum Perineum Ultrasonography

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References (28)

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