Objective assessment of vitiligo with a computerised digital imaging analysis system.

Area of Science:

• Dermatology
• Medical Imaging
• Clinical Trials

Background:

• Quantifying treatment response in vitiligo objectively remains a challenge.
• Physician's global assessment (PGA) is subjective and may lack consistency.
• There is a need for reliable tools to measure repigmentation in vitiligo.

Purpose of the Study:

• To objectively evaluate vitiligo treatment response using a computerised digital imaging analysis system (C-DIAS).
• To compare the efficacy of C-DIAS with the physician's global assessment (PGA).

Main Methods:

• 56 patients with vitiligo applied tacrolimus ointment 0.1% twice daily.
• Lesions were photographed every 6 weeks for 24 weeks.
• Repigmentation was assessed using C-DIAS (MPR-C-DIAS) and PGA, with response categorized into none, mild, moderate, good, and excellent.

Main Results:

• 44 out of 56 patients (79%) showed a response by C-DIAS.
• Physician's global assessment indicated 70% of patients responded.
• A poor agreement (κ=0.17, P=0.053) was observed between C-DIAS and PGA, indicating significant differences in assessment.

Conclusions:

• The computerised digital imaging analysis system (C-DIAS) provides an objective method for analyzing vitiligo skin lesions.
• C-DIAS demonstrates potential for consistent and objective quantification of treatment response in vitiligo.
• Further studies are needed to validate C-DIAS against other objective measures and refine its application in clinical practice.