Pancytopenia as a first presentation of late-onset systemic lupus erythematosus: a case report.

Introduction: Systemic lupus erythematosus (SLE) is a systemic immune disease that classically occurs in young to middle-aged women and may present with cutaneous, renal, haematologic, neurological, and/or other symptoms at the time of diagnosis. Late-onset SLE or SLE in the elderly is a subtype that differs from classic SLE in terms of age group, clinical symptoms, organ involvement and severity. Case presentation: A 63-year-old female noted to have pancytopenia. The patient was diagnosed with lupus upon obtaining clinical presentations and serological marker, along with high titres of the antinuclear antibody and/or anti-double-stranded DNA antibody. The patient was managed with glucocorticoids and mycophenolate mofetil therapy, which led to a rapid response. Discussion: Late-onset SLE accounts for 2-12% of SLE patients with a minimum age of onset of 50 years and older, leading to significant delays in diagnosis. Late-onset SLE differs from early-onset SLE in terms of sex and ethnicity prevalence, clinical symptoms and signs, development of organ damage, disease activity and severity, and prognosis. Some studies have also shown that late-stage SLE patients have higher rates of RF and anti-Ro/anti-La antibody positivity, lower complement titre, and higher incidence of elevated creatinine and decreased creatinine clearance. First-line treatment of pancytopenia is glucocorticoid. In refractory cases, rituximab and immunosuppressants can be used. Conclusion: It is important to assess any unusual presentation of SLEs when clinical suspicion remains high and conducting further laboratory and imaging investigation.