A patient receiving adalimumab for rheumatoid arthritis had ulcerated plaques on the anterior and lateral aspects of the neck, upper chest, and nape and erythroderma on the dorsum of the hands, corresponding to areas of sun exposure, as well as swelling of the proximal interphalangeal hand joints bilaterally. What is the diagnosis and what would you do next?
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Yan et al. (2025) studied this question.
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