Two Cases of Subungual Epidermoid Cyst
- Author:
Jongwook KIM
1
;
Yeona KIM
;
Sang-Hyeon WON
;
Kyung-Nam BAE
;
Jungsoo LEE
;
Kihyuk SHIN
;
Hoonsoo KIM
;
Hyunchang KO
;
Byungsoo KIM
;
Moon-Bum KIM
Author Information
1. Department of Dermatology, Pusan National University School of Medicine, Yangsan, Korea
- Publication Type:Case Report
- From:Korean Journal of Dermatology
2022;60(8):517-521
- CountryRepublic of Korea
- Language:English
-
Abstract:
Epidermal cysts are the most common cutaneous cysts that originate from the hair follicles. Therefore, they are rarely found in areas without hair follicles, such as the palms, soles, and subungual areas. Herein, we reported two cases of subungual epidermoid implantation cysts. The first patient was a 52-year-old male who presented with onycholysis and a subungual white mass on the middle fingernail of the right hand. The second patient was a 67-year-old male who presented with an erythematous patch and swelling of the proximal nail fold of the right thumb. Ultrasonography revealed bone erosion and a round-to-elliptical mass with internal avascularity. Heterogeneous echogenicity and internal echogenic foci were detected in both patients. After nail avulsion, a skin-colored mass was observed. Histopathological examination revealed typical epidermal cysts in both patients. Herein, we report two rare cases of subungual epidermoid implantation cysts.
