Ann Dermatol.  2008 Jun;20(2):67-69. 10.5021/ad.2008.20.2.67.

A Case of Digital Myxoid Cyst Coexisting with Epidermal Inclusion Cyst

• Kim BS
• Jwa SW
• Suh SW
• Kim SJ
• Oh CK
• Kwon KS
• Kim MB

• KMID: 2172086
• DOI: http://doi.org/10.5021/ad.2008.20.2.67

Abstract

A 62-year-old male developed a solitary asymptomatic nodule on the lateral aspect of the distal interphalangeal joint of the right great toe. Histopathologic findings demonstrated a myxoid cyst with a concomitant epidermal inclusion cyst. To the best of our knowledge, this is the first case of concurrent occurrence of digital myxoid cyst and epidermal inclusion cyst. Although the exact mechanism for developing a digital myxoid cyst and an epidermal inclusion cyst simultaneously at the same site is not explained, trauma might be a possible cause.

Keyword

Digital myxoid cyst; Epidermal inclusion cyst; Co-occurrence

MeSH Terms

Ganglion Cysts
Humans
Joints
Male
Middle Aged
Toes

Figure

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  Fig. 1 Solitary dome-shaped nodule measuring 0.8×0.9 cm on the lateral aspect of distal phalanx of the great toe.

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  Fig. 2 (A) Histopathologic findings show a cystic lesion lined by keratinizing stratified squamous epithelium compatible with epidermal inclusion cyst (H&E stain, original magnification ×40). (B, C) Myxoid materials around epidermal inclusion cyst shows the presence of abundant mucin (Alcian blue 2.5 stain (B) and Colloidal iron stain (C), original magnification, ×100 (B), original magnification, ×200 (C)).

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