Pilar sheath acanthoma

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Pilar sheath acanthoma
Other names: Infundibuloisthmicoma[1]
Skin colored nodule diameter in 1 cm in eyebrow
SymptomsSingle small small or larger bump with central keratin-plug in dip, typically above upper lip[1]
Usual onsetMiddle-age, elderly[1]

A pilar sheath acanthoma is a single small small or larger bump with a central keratin-plug in a dip, typically above upper lip in adults.[1] It is usually around 05cm to 1.0cm.[1]


See also


  1. 1.0 1.1 1.2 1.3 1.4 1.5 DE, Elder; D, Massi; RA, Scolyer; R, Willemze (2018). "3. Appendageal tumours: pilar". WHO Classification of Skin Tumours. Vol. 11 (4th ed.). Lyon (France): World Health Organization. p. 207. ISBN 978-92-832-2440-2. Archived from the original on 2022-07-11. Retrieved 2022-08-31.