Matching between ctlinical examination and dermoscopy in patients with nail psoriasis: Should dermoscopy be used instead of clinical examination?

Background: Dermoscopy has emerged as a useful diagnostic tool to evaluate skin lesions, including psoriasis. We aimed to compare the clinical examination and digital dermoscopy findings of nail involvement in patients with psoriatic nails. Methods: This study included 60 patients with clinically diagnosed psoriasis. The nail findings and NAPSI were evaluated clinically and via dermoscopy, and then the severity of the disease was calculated using PASI criteria. Results: About 32 patients were males, with a median PASI score of 4.4, and pitting and subungual hyperkeratosis were the most common findings. The clinical and dermoscopic examination had a moderate diagnostic resemblance regarding onycholysis, subungual hyperkeratosis, and leukonychia. The resemblance between the two methods for the diagnosis of leukonychia in patients with a duration of disease <2 years (Kappa = 0.59) and 2-6 years was moderate (Kappa = 0.48), and for 6 years< was perfect (Kappa = 0.62). The resemblance for the diagnosis of subungual hyperkeratosis and onycholysis in subjects with a duration of disease <2 years was slight, and for 2-6 years and 6 years< were moderate. The resemblance between the NAPSI score by the two methods was also moderate (95%CI -0.89-0.81, P < 0.001). Conclusion: Dermoscopy is an efficient, supportive, and non-invasive method providing a better diagnosis of nail psoriasis.

Dermoscopic features of lichen planopilaris in Northern Iran: a prospective observational study.

BACKGROUND: Dermoscopy can be helpful in assessing nonpigmented lesions and inflammatory processes like lichen planopilaris (LPP). MATERIAL & METHODS: In this observational prospective study, 81 patients with a cicatricial alopecic patch on their scalp were included and underwent dermatologic examination. A biopsy was taken from the active part of the lesion based on dermoscopy evaluation. RESULTS: Analysis of 44 patients with definite diagnosis of LPP revealed that the mean age at the time of presentation was 44.05 ± 12.62 years. More than 77% of patients had at least one form of the follicular opening disorder. About 75% of patients had shaft disorders. The most common pattern of pigmentation was milky-red (97.73%). The irregular and ectatic vascular network were seen in 59.09% of patients. Patients with coiled and twisted hairs, small yellow dots, large yellow dots, and peripilar sign were more likely to have shorter disease duration (P < 0.05). Those with overall shaft disorders were younger (P = 0.02). Small yellow dots (P = 0.025) and peripilar sign (P = 0.039) were more common in female patients. CONCLUSION: Dermoscopy can be a helpful diagnostic tool in differentiating LPP among patients with primary cicatricial alopecia (PCA). Larger cohort studies are recommended to find the role of demographic factors in predicting the dermoscopic patterns among LPP patients.