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.
