Part I: Accuracy of Teledermatology in Inflammatory Dermatoses

The study, conducted in São Paulo, Brazil, assessed the accuracy of teledermatology in diagnosing inflammatory dermatoses in a retrospective cohort of 30,976 patients with 55,012 lesions. Focusing on the 20 most frequent inflammatory dermatoses, the study included 739 patients and lesions. The findings showed a high level of agreement between teledermatologists and in-person dermatologists, with a complete agreement rate of 78% and a substantial Cohen's kappa of 0.743. The combined total and partial agreement rate was 86%, indicating almost perfect agreement. The accuracy varied by disease, with some diseases showing over 90% agreement and others less than 60%. Despite potential biases and missing data, the study, which is one of the largest of its kind, supports the viability of store-and-forward teledermatology for patient care in diagnosing inflammatory dermatoses.