The Efficacy of C02 Laser 10,600nm in the Treatment of Dermatosis Papulosa Nigra in Sudanese Patients

Abstract

Dermatosis papulosa nigra(DPN) is a pigmented papular eruption of the face and neck Clinically, the features of photo aging in African can include fine wrinkling, mottled pigmentation, and DPN. The individual lesions are black or dark brown, flattened or cupuliform papules 1-5 mm in diameter size. The papules of DPN show no tendency to regress spontaneously and the condition may be cosmetically undesirable to some patients. This is a prospective clinical descriptive, intervention study, aimed to detect the efficacy of C02 laser in the treatment of DPN in Sudanese patients. The study was performed at Sudan University of Science and Technology, Institute of Laser, in the laser clinic. The study was conducted from March - Augest 2014. Ten patients ( eight females and tow males) clinically diagnosed as cases of DPN, have been included, and were considered as the study population. They were treated with IB-60IB C02 laser system 10,600nm. All patients received the same laser parameters of C02 laser, using the non contact method, repetitive pulse 3.5 Watt power, 0.1 second duty time, 0.1 second idle time. The aim of the C02 laser in this study was to coagulate the melanin and concerned blood vessels in the lesions. The frequency of treatment was single session per week for a total of one, two to three sessions according to the patient need. Photographs were taken before treatment, one week, three weeks and six weeks after the last session to observe the pattern of response to C02 laser therapy This study result revealed that most of the patients 9 (90%) are achieved excellent result and completely cure with out residual complication and very good in 1 (10 % ) of the patients'. The conclusion of this study is that C02 laser 10,600 nm is effective in treatment of DPN since the treatment is well tolerated , cause no major side effects. More studies and long term follow up are needed to confirm these findings.