Concurrent Primary Cutaneous Cryptococcosis and Bowen's Disease in a Patient With Multiple Sclerosis on Fingolimod: A Rare Case Report and Review of Literature.

Fingolimod is an oral disease-modifying treatment used for the relapsing-remitting forms of multiple sclerosis, which may render patients susceptible to opportunistic infections and lead to an increased risk of skin cancer. We report a 56-year-old woman with multiple sclerosis in remission on fingolimod treatment for five years presenting with the following skin lesions. Our patient presented with a non-healing ulcerated erythematous lesion on the left lower abdomen for six months and a crusted erythematous plaque on the forehead that had not healed for one year.