P106 A dermoscopic finding of Tinea capitis caused by Microsporum canis

Abstract

Poster session 1, September 21, 2022, 12:30 PM - 1:30 PM ObjectivesTinea capitis is a relatively common disease, and the mycological examination is the gold standard for diagnosis. However, the probability of false negative on the KOH test is up to 40% and culture examination takes a long time for diagnosis. The characteristic pattern of dermoscopy not only aids in diagnosis, but also enables early treatment.MethodsWe evaluated six patients who were diagnosed with tinea capitis through clinical and dermoscopic findings. The images of the lesions were taken with a digital camera (Nikon, HB-42) and photographed with dermoscopy (Dermlite Foto 2 Pro) from the patients. The pictures were obtained by taking multiple focal points with dermoscopy. The comma, corkscrew, Morsecode-like, zig-zag, and bent hairs were observed as the main findings.ResultsThe dermoscopic finding was seen with overlapping of various findings in each of the patients. Upon dermoscopy, the most common findings were the corkscrew hair (66%) and the bent hair (66%). The comma hair (33%) and the proximal white shaft hair (33%) were less frequently observed and zigzag hair and Morse-code like hair were not seen in six patients. In the photograph taken with a camera, findings considered to be dermoscopic features such as corkscrew hair or comma hair were not observed.ConclusionIt is important for dermatologists to consider that abnormal findings in dermoscopy can play an important role in diagnosing Tinea capitis. And it will help in early treatment and prevent the progression of complications. Here in, we report specific dermoscopic findings which can narrow down the differential diagnosis.