Bullous pemphigoid probably associated with pembrolizumab: a case of delayed toxicity.

Dear Editor, An 81-year-old male patient with hypertension, chronic kidney disease, Crohn's disease, and a high-grade metastatic urothelial bladder carcinoma with 12 years of evolution was treated with chemotherapy and radical cystoprostatectomy. Skin biopsy showed a subepidermal blister with an inflammatory infiltrate in the papillary dermis, presenting eosinophils and neutrophils (Fig. Bullous pemphigoid after anti-PD-1 therapy: a retrospective case-control study evaluating impact on tumor response and survival outcomes. [Extracted from the article]