No systematic reviews were found.
One 18-week study of Grenz rays using a grading system as outcome parameter11 and one study of superficial radiotherapy, using (nearly) clearing as an outcome parameter,12 found no beneficial effect. One 10-week RCT of Grenz rays13 and one 18-week RCT of superficial xrays14 found a beneficial effect.
Versus topical PUVA
One trial found a superior effect of radiotherapy at 6 weeks, but after 18 weeks follow up there was no difference in reduction of severity scores.15
One study of 18 weeks' duration found a superior effect of conventional x rays from the doctor's point of view but the patients' rating showed no difference.16
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