An eruption of basal cell carcinoma after ibrutinib.

Ibrutinib is a therapy targeting tyrosine kinase that has been used for various hematologic malignancies. It is associated with a variety of adverse effects, several of which are dermatologic. While there are few discussions of basal cell carcinoma as an adverse event, there have not yet been reports of a significantly increased incidence. Here, we present a patient with no dermatologic history who subsequently developed nearly 30 incidents of basal cell carcinoma after starting ibrutinib, leading to discontinuation of the therapy.