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CHARACTERISTICS OF SCALP LESIONS OF PSORIASIS AND SEBORRHEIC DERMATITIS DISEASE BY DERMOSCOPY ANALYSIS
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Abstract
Objectives: To describe the dermoscopic features of scalp on patients with psoriasis and seborrheic dermatitis examined at Ho Chi Minh City Hospital of Dermato-Venereology from November 2022 to May 2023. Methods: A case series study on 97 patients with scalp psoriasis and 77 patients with scalp seborrheic dermatitis were diagnosed clinically and then analyzed by dermoscopy. Results: The median age of psoriasis patients was 42, seborrheic dermatitis patients was 33. The female:male ratio of psoriasis patients was 1:1,4; seborrheic dermatitis patients was 1:2,4. On naked eye examination, the most common features of scalp psoriasis were bright red background color (79,38%), well-dermacated edges (73,2%) with white (85,57%) and thick (51,55%) scales; the most common features of scalp seborrheic dermatitis were dull red background color (68,83%), not well-dermacated edges (58,44%) with white (66,23%) and thin (63,64%) scales. Dermoscopy results recorded in our study were as allows: scalp psoriasis was characterized by dotted, glomerular vessels (90,72%), distribute regularly (91,75%), diffuse scales (28,87%); scalp seborrheic dermatitis was characterized by comma vessels (76,62%), distribute irregularly (68,83%) and perifollicular scales (51,95%). Conclusion: Dermoscopy can be used to assit in identifying two diseases clinically
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Keywords
dermoscopy, psoriasis, seborrheic dermatitis.
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