A Case of cutaneous large B-cell lymphoma during treatment of multiple sclerosis with fingolimod

The authors report a case of a 69-year-old woman with multiple sclerosis treated with fingolimod for duration of over one year who subsequently developed cutaneous large B cell lymphoma. There are few reported cases of lymphoma associated with fingolimod treatment for multiple sclerosis, but rates are higher than expected in the general population. The authors hope to promote awareness of the potential risk of this medication so that more diligent disease surveillance can be performed by both prescribing practitioners of fingolimod and their patients who receive it.