Clinical Retrospective Dermatology Study on 169 Cases of Chronic Actinic Dermatitis

［Abstract］Objective　To investigate clinical features of chronic actinic dermatitis（CAD） in Kunming of Yunnan Province．Methods　From October 2008 to October 2013，CAD in-patients in our hospital were selected and their general conditions，outcomes of photo-sensitive test and photo-patch test were analyzed in details．Results　（1）Among 169 CAD patients，gender ratio（male: female） was 8.9:1. The lesions were mainly distributed on the exposed areas. （2）Photo-sensitive tests of 93 patients showed that the average value of UVA-MPPDwas 7.39 JPcm2 and that of UVB-MED was 20.91 mJPcm2. （3）The results of photo-patch test in 83 patients showed that 48 patients （67.8%）had positive reactions in patch test， and the most common contactant was balsam peru. Fifty-eight patients（69.9%）had positive reactions in photo-patch test indicating that the most common contactant in photo-patch test was balsam peru．Conclusions 　CAD appears mostly in the middle aged and the aged males and the lesions are mainly distributed on exposed areas. The most common contactants in photo-patch test are balsam peru and perfumed compounds.