Preliminary Study Of Dermoscopy In Differential Diagnosis Of Lupus Erythematosus And Dermatomyositis

Objective:Dermoscopy combined with computer data processing as an auxiliary method for dermatologist diagnosis has received more and more attention and application in recent years.Lupus erythematosus and dermatomyositis are the most representative in autoimmune skin diseases,and there is no report of in-depth systematic research on cutaneous endoscopy of lupus erythematosus and dermatomyositis.To this end,this topic uses dermoscopy to observe the rashes of patients diagnosed with lupus erythematosus and dermatomyositis,analyzes and summarizes the characteristics of related skin lesions under dermoscopy,and provides a certain auxiliary diagnosis basis for the two in the early diagnosis.Methods:Apply DERMOSCOPU-Ⅱ(× 20)dermoscopy to the skin lesions of patients with lupus erythematosus and dermatomyositis treated at the Second Affiliated Hospital of Kunming Medical University from February 2019 to December 2019.Check,collect pictures and analyze,summarize and statistically process related data.According to the type and purpose of the data,use IBM SPSS Statistics 23.0 software for statistical processing.Results:A total of 35 patients with lupus erythematosus diagnosed clinically and/or pathologically and 10 patients with dermatomyositis were included in this study.Dermatoscopy results in patients with lupus erythematosus:1.Facial lesions are mainly pigmentation(97%),vascular structure(91%)and hair follicle angle plug(76%),peri-follicular halo(58%);2.Auricle Rashes are more pigmented(90%),squamous(90%)and telangiectasis(90%),white unstructured areas and hair follicle horn plugs(40%);3.Double-finger dermoscopy with red background Pointed,spherical bleeding points,linear blood vessels of nail folds are more common.Dermatoscopy results of patients with dermatomyositis:1.The face is common with reticular blood vessels(89%),atypical blood vessels(78%),scales(67%)and reticular pigments(67%).2.The main skin lesions of the lim bs are mainly broken porcelain texture-like structures(60%),punctate blood vessels(40%),and nail fold scales(40%).Ulcers/erosions(50%)are common rashes on the elbows,shoulders and back.Conclusion:Dermatoscope is a non-invasive auxiliary examination tool,which can provide auxiliary basis for its diagnosis and differential diagnosis of related inflammatory diseases by observing the characteristics of pigment,hair follicle and vascular structure of lupus erythematosus and dermatomyositis.