GIÁ TRỊ CỦA PHƯƠNG PHÁP SOI PHÂN TÍCH MÓNG ONYCHOSCOPY TRONG CHẨN ĐOÁN NẤM MÓNG

Abstract

Objective: To compare the sensitivity, specificity, positive diagnostic value, negative diagnostic value of Onychoscopy nail analysis by fungal culture in the diagnosis of nail fungus. Subjects and methods: All patients diagnosed with nail fungus infection were assigned to both Onychoscopy nail analysis and fungal culture during the study period at Hanoi Dermatology Hospital. A Cross-sectional descriptive study was applied. Results: The value of the image characteristics of Onychoscopy analysis to find fungal lesions of the nail using the fungal culture method to determine the fungus: the aurora nail plate (yellow opaque nail, white opaque nail, blue-black nail) has a sensitivity of 81.3-96.6%, a specificity of 51.4-84.6%, a positive diagnostic value of 49.2-93.8%, a negative diagnostic value of 61.1-97.2%, a vertical nail line has a sensitivity of 88.2%, a specificity of 84.8%, a positive diagnostic value of 92.3%, and a negative diagnostic value of 77.7%. Non-specific imaging features of subungual keratosis have a sensitivity of 75.8%, a specificity of 57.1%, a positive diagnostic value of 76.9%, a negative diagnostic value of 55.5% and a nail separation feature with a sensitivity of 66.7%, a specificity of 39.02%, a positive diagnostic value of 61.5%, and a negative diagnostic value of 44.4%. Conclusion: Onychoscopy is a valuable diagnostic test for nail fungus lesions. Therefore, this method can be applied in clinical practice to approach the diagnosis of patients with nail fungus.