A maintenance protocol for psoriasis plaques cleared by the 308 nm excimer laser

Area of Science:

• Dermatology
• Phototherapy
• Laser Treatment

Background:

• Psoriasis vulgaris is a chronic inflammatory skin condition.
• The 308 nm excimer laser is utilized for targeted phototherapy in psoriasis treatment.
• Maintaining plaque clearance after initial treatment is crucial for long-term management.

Purpose of the Study:

• To evaluate the effectiveness of tapering the dose frequency of 308 nm excimer laser treatments.
• To assess the maintenance of psoriasis plaque clearance after achieving at least 75% improvement.
• To determine if a reduced treatment schedule can sustain therapeutic outcomes.

Main Methods:

• Prospective case series involving five adult patients with plaque-type psoriasis vulgaris.
• Initial treatment involved biweekly 308 nm UVB doses, with subsequent frequency tapering.
• Outcomes measured by Psoriasis Area and Severity Index (PASI) scores and target lesion clearance.

Main Results:

• All patients achieved at least 75% clearance of target psoriatic plaques.
• No disease flares were observed during the initial month of treatment tapering.
• Four out of five patients maintained clearance based on PASI scores after six weeks of tapering.

Conclusions:

• Biweekly 308 nm UVB laser treatments are effective in clearing psoriatic plaques.
• A tapering schedule for laser treatments appears beneficial for maintaining achieved clearance.
• Further randomized, prospective trials are necessary to establish optimal maintenance protocols.