Porokeratotic eccrine ostial and dermal duct naevus
Porokeratotic Eccrine Ostial and Dermal Duct Naevus (PEODDN) is a rare congenital disorder of keratinisation. Keratinisation is the process by which the skin cells form in the epidermis. PEODDN is a special type of epidermal naevus.
Porokeratotic eccrine and hair follicle naevus is a very similar entity.
PEODDN is usually present at birth (a birthmark) and becomes more apparent as the person becomes older. However, some cases of PEODDN have been reported to develop for the first time after puberty.
PEODDN is characterised by small discrete scaly papules arranged in a line, most commonly on the palm of the hand (or fingers) or or sole of the foot (or toes). It may extend onto the backs of the hands and feet. There are rare cases of extensive lesions affecting large parts of the body. PEODDN usually becomes more warty in appearance over time and nearly always persists despite treatment.
PEODDN is usually not associated with any symptoms, although, occasionally it can be a bit itchy.
Treatments aimed at reducing the thickness of the warty skin in the affected area include:
- Exfoliating agents (e.g creams containing salicylic acid, urea, propylene glycol)
- Topical retinoids (e.g tretinoin)
- Systemic retinoids (e.g acitretin)
These treatments are only partly effective.
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- Yu HJ, Ko JY, Kwon HM, Kim JS. Linear psoriasis with porokeratotic eccrine ostial and dermal duct nevus. J Am Acad Dermatol. 2004 May;50(5 Suppl):S81-3.
- Mazuecos J, Ortega M, Ríos JJ, Camacho F. Long-term involution of unilateral porokeratotic eccrine ostial and dermal duct naevus. Acta Derm Venereol. 2003;83(2):147-9.
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- Sassmannshausen J, Bogomilsky J, Chaffins M. Porokeratotic eccrine ostial and dermal duct nevus: a case report and review of the literature. J Am Acad Dermatol. 2000 Aug;43(2 Pt 2):364-7.
- Del Pozo J, Martínez W, Verea MM, Yebra-Pimentel MT, García-Silva J, Fonseca E. Porokeratotic eccrine ostial and dermal duct naevus: treatment with carbon dioxide laser. Br J Dermatol. 1999 Dec;141(6):1144-5.
- Leung CS, Tang WY, Lam WY, Fung WK, Lo KK. Porokeratotic eccrine ostial and dermal duct naevus with dermatomal trunk involvement: literature review and report on the efficacy of laser treatment.< Br J Dermatol. 1998 Apr;138(4):684-8.
- Beer K, Medenica M. Solitary truncal porokeratotic eccrine ostial and dermal duct nevus in a sixty-year-old man. Int J Dermatol. 1996 Feb;35(2):124-5
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