Nevus comedonicus--case report and review of therapeutical approach.

Nevus comedonicus is uncommon abnormality of pilosebaceous unit, clinically characterized as confluent clusters of dilated follicular orifices plugged with pigmented keratinous material that resembles open comedones. It is suggested that nevus comedonicus is an uncommon variant of adnexal hamartoma, which clinically appears as linear group of open comedones. Since Kofmann's description of nevus comedonicus in 1895, there have been reports of this rare cutaneous disorder associated with developmental anomalies. We present a case of a 19-year-old woman with numerous 1-3 mm size darkly pigmented, keratic plugs clustered in linear unilateral patches on left abdominal part. Our treatment consisted of the avoidance of the formulations containing nickel sulfate and carba mixture, daily local application of tretinoin 0.1% gel and corticosteroid ointment (momethasone furoate). After 4 weeks of local therapy cosmetic result was evident. The slight resolution of keratin plugs could also be seen. Two months after the treatment, there were no visible skin exacerbations.