An acanthoma is a skin neoplasm composed of squamous or epidermis (skin), epidermal cells. It is located in the Stratum spinosum, prickle cell layer. Types of acanthoma include pilar sheath acanthoma, a benign follicular tumor usually of the upper lip; clear cell acanthoma, a benign tumor found most frequently on the legs; and Degos acanthoma, often confused with but unrelated to Degos disease.

History

In 2005, "Acanthoma" was added to Medical Subject Headings, MeSH as an index term; previous indexing was "Skin Neoplasms" (1965–2004). At that time, PubMed indexed only 206 articles with the term "acanthoma" (the term usually in the title or abstract).

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Rare cancers {{neoplasm-stub