Ann Dermatol.  2011 Oct;23(Suppl 2):S267-S269. 10.5021/ad.2011.23.S2.S267.

Pseudocyst of the Scalp

• Lee SS
• Kim SY
• Im M
• Lee Y
• Seo YJ
• Lee JH

• KMID: 2156807
• DOI: http://doi.org/10.5021/ad.2011.23.S2.S267

Abstract

Pseudocyst of the scalp is described in the Japanese literature as a skin-colored cystic tumor localized on the forehead, whereas alopecic and aseptic nodules of the scalp are described in the French literature as asymptomatic nodules on the scalp that lack a pseudocyst-like architecture. The etiology of these diseases is unknown, but the lesions are likely due to follicular occlusion. Here, we report a case of pseudocyst of the scalp in a 72-year-old woman. The patient had a dome-shaped painless tumor on her scalp. Histologic examination showed a pseudocyst-like architecture with no true cystic wall. Here, we report a case of pseudocyst of the scalp and summarize the characteristic features of both pseudocyst of the scalp and alopecic and aseptic nodules of the scalp.

Keyword

Alopecic and aseptic nodules of the scalp; Follicular occlusion; Pseudocyst of the scalp

MeSH Terms

Aged
Asian Continental Ancestry Group
Female
Forehead
Humans
Scalp

Figure

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  Fig. 1 Clinical appearance of the cystic tumor. Note the alopecia on top of the tumor.

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  Fig. 2 Multi-detector computed tomography suggested that the tumor was not fixed to the bone, and was instead limited to the skin above the skull.

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  Fig. 3 Histopathologic findings. Note the ill-defined cystic wall H&E, ×20).

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