Epidermoid Cyst with Foreign Body Granuloma Formation in Hip: A Case Misdiagnosed by Ultrasound

January 2020 in “ Advanced ultrasound in diagnosis and therapy ”

MD Shanyong Mao, MD Yining Xiang, MD Haiyan Zhou, M. Zhang, Ms Miaochun Chen, MD Bei Zhang

epidermoid cyst dermoid cyst ultrasound imaging hair follicle echogenic changes skin junction

TLDR Epidermoid cysts can be better diagnosed with ultrasound by recognizing specific features and using clinical information.

The document reported a case where an epidermoid cyst in the hip was misdiagnosed as a dermoid cyst using ultrasound imaging. Retrospective analysis revealed that epidermoid cysts could be identified by specific features such as originating from the skin, having an expansive hair follicle-like structure at the skin junction, and displaying onion-like or mixed echogenic changes. These characteristics, when combined with clinical information, could enhance the diagnostic accuracy of ultrasound imaging for epidermoid cysts.

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