Acute Lupus Pneumonitis with Cytomegalovirus Co-infection in Patients with Lupus Nephritis

Abstract

Introduction: Most patients with systemic lupus erythematosus (SLE) show signs of pulmonary involvement. The clinical manifestations of Lupus Pneumonitis are the similar to those of acute interstitial pneumonia. The use of cyclophosphamide in lupus nephritis (LN) is associated with high CMV titers. Ganciclovir is the main choice of therapy for CMV pneumonia infection. Case presentation: A 19-year-old female with previous history of lupus nephritis presented with worsening dyspnea, productive cough with yellowish sputum and hemoptysis. Following physical, laboratory and radiological examinations, the patient was diagnosed with acute lupus pneumonitis, with a differential diagnosis of pneumonia infection. During treatment in the intensive care unit (ICU), she was put on ventilator and received routine hemodialysis due to pulmonary edema. She was given intravenous antibiotics before the culture results came out, but there was no clinical improvement. Once the culture results returned negative, the antibiotics were discontinued and IV pulse methylprednisolone was started. There was significant clinical, radiological, and laboratory improvements. After discharge, the patient experienced hemoptysis again due to CMV pneumonia infection and was given ganciclovir therapy with satisfactory results. Conclusion: In patients with advanced LN and pulmonary involvement, distinguishing between infection and SLE flares may be challenging, which can cause dilemma in diagnosis and treatment decisions. Adequate oxygenation with ventilator, hemodialysis, and administration of ganciclovir and mycophenolic acid provides significant improvements in patient care.