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A case of developing progressive multifocal leukoencephalopathy while using rituximab and mycophenolate mofetil in refractory systemic lupus erythematosus

Authors Ishikawa Y, Kasuya T, Ishikawa J, Fujiwara M, Kita Y

Received 2 March 2018

Accepted for publication 23 April 2018

Published 26 June 2018 Volume 2018:14 Pages 1149—1153


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Professor Garry Walsh

Yuichi Ishikawa, Tadamichi Kasuya, Junichi Ishikawa, Michio Fujiwara, Yasuhiko Kita

Department of Rheumatology, Yokohama Rosai Hospital, Kohoku-ku, Yokohama, Kanagawa, Japan

Abstract: Progressive multifocal leukoencephalopathy (PML) is a central nervous system infection caused by John Cunningham (JC) virus reactivation in an immunocompromised patient. PML has various neurologic symptoms and has very poor prognosis. A 36-year-old man developed transverse myelitis and had a psychiatric disorder at the age of 26. He was diagnosed with systemic lupus erythematosus (SLE) and neuropsychiatric SLE (NPSLE), on the basis of leukopenia and presence of anti-DNA and anti-nuclear antibodies. Treatment with glucocorticoid (GC) was started, and remission was introduced. Six months before PML onset, his condition was complicated with hemophagocytic lymphohistiocytosis (HLH) due to exacerbation of SLE. Remission re-induction therapy by GC, cyclosporine-A, intravenous cyclophosphamide, and rituximab (RTX) was initiated and HLH improved. However, interleukin-6 levels of the cerebrospinal fluid (CSF) continued to rise. We thought that the disease activity of NPSLE worsened; thus, we introduced mycophenolate mofetil (MMF) 4 months before the PML onset. He developed progressive dysarthria and right hemiplegia. He was diagnosed with PML via magnetic resonance imaging and JC virus polymerase chain reaction in CSF. Considering that immunosuppressants, including RTX and MMF, are precipitating factors of PML, we discussed the RTX removal using plasma exchange (PEx), but we did not introduce PEx, because it was expected that the concentration of RTX was already lowered when he was diagnosed with PML. Treatment for PML with mefloquine and mirtazapine saved his life, but severe residual disabilities remained. This is the first report of a patient who developed PML during combination therapy with RTX and MMF.

Keywords: progressive multifocal leukoencephalopathy, systemic lupus erythematosus, rituximab, mycophenolate mofetil, mefloquine

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