With the widespread use of immunotherapy in numerous solid tumours, immunotherapy-related adverse events (irAEs) have started to emerge and bring new challenges for clinicians to manage. Among established irAEs, dermatologic toxicity is one of the most common toxicities; it is often mild but can be severe and potentially life-threatening, such as bullous pemphigoid. Here, we report a case of nivolumab-mediated severe, extensive, refractory bullous pemphigoid involving both skin and oral mucosa

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... n a patient with metastatic renal cancer. We also summarise a list of selected case reports of immunotherapy-induced bullous pemphigoid by literature review. We highlight various presentations, investigations and managements of this type of skin irAEs. Meantime, we would like to discuss the correlation of skin irAEs incidence rate with immunotherapy drug benefit and resistance.