Related Experiment Video
Updated: Aug 3, 2026

Minimal Erythema Dose (MED) Testing
Published on: May 28, 2013
UVA1 for diffuse cutaneous systemic sclerosis in a Fitzpatrick skin type VI patient: outcomes in the modified Rodnan
Bárbara Roque Ferreira1, Ana Rita Gameiro1, Maria Manuel Brites1
1Centro Hospitalar e Universitário de Coimbra.
Introduction:
Cutaneous sclerosis can lead to important mobility impairment. Ultraviolet (UV) A1 phototherapy may improve skin sclerosis, although most of the studies have been with Caucasian patients.
Material And Methods:
A 44-year-old patient, Fitzpatrick skin type VI, was being followed up with the diagnosis of diffuse cutaneous systemic sclerosis. He had significant mobility impairment, especially of the right hand and arm. In 2015 he started UVA1 phototherapy daily, Monday until Friday (Waldmann® 7001 UVA cabin equipped with 40 Philips TL/10R lamps - spectral irradiation between 340 and 400 nm). The initial dose was 10 J/cm2, rapidly increased up to a steady dose of 35 J/cm2.
Results:
After 40 sessions of UVA1, active fingers flexion and abduction of the right arm significantly improved and the modified Rodnan skin score changed from 26 to 11.
Conclusion:
The modified Rodnan skin score is a practical and useful tool during the follow-up of patients with systemic sclerosis. UVA1 phototherapy improves cutaneous sclerosis, and the related mobility impairment, and a dose of 35 J/cm2 is effective, even in higher phototypes, having a good safety profile.
Related Concept Videos
Changes in Skin Color: Clinical Perspectives
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...
Skin Cancer
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Assessment of the Cardiovascular System III: Palpation
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above the...

