Radiation recall dermatitis during treatment of endometrial cancer with pembrolizumab plus lenvatinib: A case report

Radiation Recall encompasses an array of inflammatory reactions, most commonly dermatitis, that occurs in response to a systemic medication with distribution in a previously irradiated field. While historically cytotoxic chemotherapy was a major culprit, this case report describes radiation recall dermatitis in response to pembrolizumab and lenvatinib in a 62-year old female with ongoing advanced endometrial cancer and history of breast cancer. Discontinuation of lenvatinib alone lead to complete resolution of the dermatitis, and she ultimately resumed her previous lenvatinib dose without recurrent symptoms. This case represents an important possible adverse effect of a commonly used targeted therapy, particularly in a population likely to have a history of prior radiation exposure.