BACKGROUND AND OBJECTIVE: Despite the extensive use of QS Ruby, there is no report looking at its long-term complication in the treatment of @entity13687 . To look at the long-term complications of @entity13687 @entity1 treated with QS Ruby laser. STUDY DESIGN/MATERIALS AND METHODS: A teaching hospital in Japan where over 400 @entity1 with @entity13687 had been treated since 1984. Hundred and one @entity13687 @entity1 that had been treated with QS Ruby laser, but had not received treatment for 12 months prior to the study, were called back for further assessment. @entity1 were called back to the hospital where they were interviewed and examined by two independent clinicians. RESULTS: @entity4182 was the most common complication, affecting 16.8% of the @entity1 and 5.9% had @entity2117 . One @entity1 that had complete clearance post-laser surgery developed recurrence. CONCLUSION: QS Ruby laser is effective in the treatment of @entity13687 . Recurrence is rare, but @entity4182 is common and can be permanent. Further prospective study comparing its use with other Q-switched lasers is necessary.

A retrospective study looking at the long-term complications of Q-switched ruby laser in the treatment of XXXX .

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'patient'] @entity2117 :: ('MESH:D017495', 'Disease') :: ['hyperpigmentation'] @entity13687 :: ('MESH:D009507', 'Disease') :: ['nevus of Ota'] @entity4182 :: ('MESH:D017496', 'Disease') :: ['Hypopigmentation', 'hypopigmentation']
@entity13687 :: (MESH:D009507,Disease) :: ['nevus of Ota']
