Signet-Ring Cell Adenocarcinoma of the Lung Associated with Fingolimod Treatment in a Patient with Multiple Sclerosis

Abstract

Fingolimod is a selective sphingosine-1-phosphate (S1P) receptor modulator approved for the treatment of relapsing-remitting multiple sclerosis (RRMS) as monotherapy, in cases of first-line treatment failure, or as a first option in aggressive forms. The appearance of neoplasms is among the infrequent side effects of treatment. This is a case report on an MS patient treated with Fingolimod who developed pulmonary signet-ring cell adenocarcinoma of the lung and features a discussion of the drug’s possible involvement in the development of these types of neoplasms.