Immunosuppressive therapy is well recognized as increasing the risk of lymphoma. Mycosis fungoides is a rare cutaneous form of T-cell lymphoma with a largely unknown etiology and not typically associated with immunosuppression. In this article, we describe our encounter with a 24-year-old male with Crohn's disease in remission on immunotherapy, specifically dual therapy with azathioprine and infliximab, presenting with a facial rash found to be consistent with mycosis fungoides on biopsy. The patient's rash resolved with treatment of topical steroids. In addition, the decision was made to discontinue his azathioprine to minimize his risks of developing future malignancies.