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In the absence of guidelines recommending routine total-body skin examination, patient concern remains the main factor in seeking consultation regarding suspicion of skin cancer. This study explores gaps in patients' understanding of malignant skin lesions, through the factors associated with incidental skin cancer. Included patients had a confirmed histological diagnosis of basal cell carcinoma, squamous cell carcinoma or melanoma. Tumour characteristics, patient demographics and other risk factors related to the development of skin cancer were obtained from each participant. The main measure was incidental skin cancer detection, using both binary logistic regression and Chi-squared Automatic Interaction Detection (CHAID) algorithm. Of the total tumours, 26.6% were detected incidentally. The following variables: male sex, living alone, long-axis diameter, tumour location, symptoms and time of disease evolution were independent predictors of incidental skin cancer. According to the CHAID algorithm, the most significant risk factor for incidental skin cancer was the absence of symptoms at diagnosis. [ABSTRACT FROM AUTHOR]

Background: Social networks have become a means for disseminating information on health‐related matters. Objective: Describe the characteristics and analyze the accuracy of the dermatology content that is most often shared on the most popular social networks. Materials and methods: The content most often shared on social networks (Facebook, Pinterest, Twitter, and Reddit) between March 2019 and March 2020 was analyzed using the keywords: acne, alopecia/hair loss, psoriasis, eczema, melanoma, skin cancer, rash, and rosacea. The total number of interactions, skin disease, topic, and origin was collected from each of the records. The content was analyzed and was categorized as precise, confusing, or imprecise based on the scientific evidence available. Results: A total of 385 websites were included. About 44.7% of the shared content was rated as imprecise, 20% as confusing, and 35.3% as precise. The records classified as imprecise obtained a higher mean number of interactions (P < 0.05). No differences were found in terms of the level of certainty and the dermatosis studied, whereas they did exist in relation to their topic and origin (P < 0.001). Of the contents classified as imprecise, the most frequent topic and origin were "alternative medicines" and "individual opinions, articles not affiliated with health institutions, nor peer reviewed," respectively. Conclusions: The majority of the contents often shared on social networks are below acceptable quality standards. Strategies are needed to discredit imprecise information and promote the dissemination of evidence‐based dermatology information. [ABSTRACT FROM AUTHOR]

"Giving information", "expressing individual views" and "discussing concerns" about mastocytosis were the major topics during group discussions, which reflect that patients are assertive in obtaining information, attending support groups and participating in social media forums. Mastocytosis is a group of disorders characterised by the accumulation and activation of mast cells in one or several organs.1 Physical symptoms are often chronic and negatively affect quality of life, but they also have a psychosocial influence on patients' family, work and relationships.2 Social media interactions are ideally suited to gain knowledge about how patients with mastocytosis experience and manage symptoms. [Extracted from the article]