%0 Journal Article %T Radiation-induced cutaneous squamous cell carcinoma showing a significant response to pembrolizumab: A case report. %A Takahashi-Watanabe M %A Fujimura T %A Amagai R %A Ohuchi K %A Yamazaki E %A Tamabuchi E %A Kuroki S %A Kambayashi Y %A Hashimoto A %A Asano Y %J J Dermatol %V 0 %N 0 %D 2024 Apr 17 %M 38629702 %F 3.468 %R 10.1111/1346-8138.17221 %X Cutaneous squamous cell carcinoma (cSCC) arising from radiation dermatitis has a higher risk of metastasis than conventional cSCC. Immunosuppression is another risk factor for cSCC, suggesting that mycosis fungoides (MF) could be a risk factor for cSCC. Here we report a case of radiation-induced cSCC with a high level of tumor-mutation burden that developed in a patient with MF who was successfully treated with pembrolizumab. The present case suggests that pembrolizumab might be an optimal therapy for radiation-induced cSCC, even at advanced stages.