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Dermoscopy and artificial intelligence performed equally well for diagnosis of melanocytic skin lesions. There was no significant difference in the diagnostic performance of various dermoscopy algorithms. The three-point checklist, the seven-point checklist and Menzies score had better diagnostic odds ratios than the others; however, these results need to be confirmed by a large-scale high-quality population-based study.

Background: Large disease registries are the preferred method to assess long-term treatment safety. If psoriasis registries collaborate in a network, their power to assess safety is increased. Objective: To identify heterogeneity in psoriasis registries and methodological challenges for synthesising the data they provide. Methods: We surveyed the registries in PSONET and identified and addressed the challenges to collaborative analysis for the network in several round table meetings. Results: Eight out of 10 registries had a prospective comparator cohort with similar disease characteristics but not on biologics. Registries differed in the coding and validation or follow-up of adverse events and in the way they sampled their population. Fifteen challenges to registries collaborating were identified in the areas of operational governance, structural conduct, bias and analysis. Conclusions: Participation in PSONET, a network of psoriasis registries, helps identify and solve common issues, enhancing the individual registries, and provides larger sets of more powerful safety data in a diverse population. Challenges to interpreting data collectively include heterogeneity in sampling, variable penetration of biologics and compatibility of different datasets.

The three guidelines that could be included rated high enough to be considered 'strongly recommended' and were included to serve as a basis for the new common European guidelines. During the development of the European guidelines, special attention should be paid to meet the requirements of good 'applicability'.

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TD can supplement infrequent specialist dermatology service in remote areas, as in this case. We conclude that for selected patients, TD was a useful training tool for supervising the GPwSI, and ensuring clinical governance and quality assurance in clinics in a remote rural area. However, this model of care was limited by cost and the inherent limitations of TD.

SummaryRecent evidence points to the T helper type 17 (Th17) subset as key in the pathogenesis of psoriasis, but cells of this type in lesions remain to be fully characterized. Here we isolated, enumerated, functionally tested and clonotyped the CD4

Cumulative length of exposure to biological therapies in patients with psoriasis in real-world clinical practice does not appear to be linked to a higher risk of cancer after several years of use.