Psoriasis and psoriatic arthritis following use of dostarlimab for endometrial cancer.

Immune checkpoint inhibitors (ICIs) are associated with immune-related adverse events (irAEs), but psoriasis and psoriatic arthritis (PsA) after use of dostarlimab have not been reported. We present a woman who received dostarlimab for endometrial cancer and subsequently developed rash and polyarthralgia, diagnosed as overlapping palmoplantar pustular and plaque psoriasis with PsA. She was treated with discontinuation of dostarlimab, topical steroids, oral methylprednisolone and methotrexate.