Occurrence of Psoriatic Arthritis during Interferon Beta 1a Treatment for Multiple Sclerosis

<table>Active synovitis and dorsal tenosynovitis of the second left metacarpophalangeal joint in a 54-year-old woman with relapsing-remitting multiple sclerosis treated by IFN-<i>β</i> 1a.</table>

Case Reports in Rheumatology

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Figure 1

Figure 1: Occurrence of Psoriatic Arthritis during Interferon Beta 1a Treatment for Multiple Sclerosis 