Pilar sheath acanthoma

A pilar sheath acanthoma is a cutaneous condition most often found on the face, particularly above the upper lip in adults.^[1]^:675

References

↑ James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: Clinical Dermatology. Saunders Elsevier. ISBN 0-7216-2921-0.

Tumor

BCC	Forms Aberrant Cicatricial Cystic Fibroepithelioma of Pinkus Infltrative Micronodular Nodular Pigmented Polypoid Pore-like Rodent ulcer Superficial Nevoid basal cell carcinoma syndrome

SCC	Forms Adenoid Basaloid Clear cell Signet-ring-cell Spindle-cell Marjolin's ulcer Bowen's disease Bowenoid papulosis Erythroplasia of Queyrat Actinic keratosis

Adenocarcinoma	Aggressive digital papillary adenocarcinoma Extramammary Paget's disease

Ungrouped	Merkel cell carcinoma Microcystic adnexal carcinoma Mucinous carcinoma Primary cutaneous adenoid cystic carcinoma Verrucous carcinoma Malignant mixed tumor

Benign
tumors

Acanthoma	Forms Large cell Fissuring Clear cell Epidermolytic Melanoacanthoma Pilar sheath acanthoma Seboacanthoma Seborrheic keratosis Warty dyskeratoma

Keratoacanthoma	Generalized eruptive Keratoacanthoma centrifugum marginatum Multiple Solitary

Wart	Verruca vulgaris Verruca plana Plantar wart Periungual wart

Other

Epidermal nevus	Syndromes Epidermal nevus syndrome Schimmelpenning syndrome Nevus comedonicus syndrome Nevus comedonicus Inflammatory linear verrucous epidermal nevus Linear verrucous epidermal nevus Pigmented hairy epidermal nevus syndrome Systematized epidermal nevus Phakomatosis pigmentokeratotica

Other nevus	Nevus unius lateris Patch blue nevus Unilateral palmoplantar verrucous nevus Zosteriform speckled lentiginous nevus

Ungrouped	Cutaneous horn

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