We present the case of a 58-year-old woman with a long-standing history of systemic lupus erythematosus (SLE) who developed a cytomegalovirus (CMV) infection with colonic perforation and subsequent purulent peritonitis whilst using combined immunosuppressive therapy. The pathogenesis and the clinical presentation of this unique case is discussed in detail. Opportunistic infection should always be kept in mind in SLE patients presenting with fever. Viral serology should be routinely performed in these patients, especially when immunosuppressive therapy is given, to avoid delay in instituting adequate management and therapy.
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