Combination therapy with rituximab and cyclophosphamide in the treatment of anti-neutrophil cytoplasmic antibodies (ANCA) positive pulmonary hemorrhage: case report
© Baird et al; licensee BioMed Central Ltd. 2011
Received: 24 June 2011
Accepted: 27 October 2011
Published: 27 October 2011
Anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) with pulmonary hemorrhage is rare in childhood. Standard treatment includes corticosteroids and cyclophosphamide (CYC), which is associated with a high level of toxicity. We report a white female with ANCA positive pulmonary hemorrhage who was treated with cyclophosphamide (CYC) and rituximab (RTX) combination therapy.
AAV with pulmonary hemorrhage is rare in childhood. Untreated AAV with pulmonary hemorrhage is associated with a 2 year mortality rate in excess of 90% . Standard treatment with a corticosteroid may be associated with medication related complications. We present a case of recurrent pulmonary hemorrhage associated with anti-neutrophil antibody (ANCA)-associated vasculitis (AAV) in childhood. Treatment with cyclophosphamide (CYC) and rituximab (RTX) produced a prompt and sustained remission, and she was able to discontinue steroid therapy.
BH, a white female, presented at 7 years of age with fever, cough and respiratory distress following Streptococcal pharyngitis. Her chest radiograph revealed bilateral patchy infiltrates. She was hospitalized with hypoxemia and hypercapnea and required intubation and mechanical ventilation for 14 days. Her endotracheal tube secretions were noted to be bloody and her hemoglobin fell from 10.6 to 8.5 g/dl within 24 hours following admission. The Indices of Coagulation were normal and she was negative for antibodies to anti-nuclear antibody (ANA) and glomerular basement membrane; in addition, protease 3 and myloperoxidase were both negative. There was no hematuria, and C-reactive protein (CRP) was elevated at 12.28 mg/dL, 8.66 mg/dL, and 10.11 mg/dL. A tracheal culture grew Pseudomonas, and chest radiographs showed diffuse airspace opacities with a small right pleural effusion. She was treated with surfactant and dexamethasone, as well as epinephrine and helium in the inspired gas and 17 mg of parenteral methylprednisolone every 6 hours for 14 days. Following a blood transfusion, she slowly stabilized with supportive care and was discharged after eighteen days. Pulmonary hemorrhage was suspected, but a bronchoscopy was refused.
One month after discharge, she complained of rhinorrhea, congestion, cough, stomach pain, and vomiting.
She was treated for 2 months with prednisolone 30 mg daily and subsequently tapered to 7.5 mg every other day. Chest radiographs continued to show bilateral patchy infiltrates, and she had periodic hemoptysis. The reticulocyte count peaked at 5.96 with a hemoglobin of 13.6, 15 months after discharge. Her prednisone dose was increased to 15 mg daily in response to continued bilateral infliltrates on radiograph and reticulocytosis.
Because she had recurrent episodes of life threatening pulmonary hemorrhage despite 3 years of chronic steroid administration, we elected to treat her aggressively for AAV at 10 years of age. At the time of the first infusion, she was being treated with 45 mg daily of prednisolone. After appropriate discussion of the risks and benefits, consent was obtained and she was hospitalized for CYC and RTX treatment (750 mg/m2 of CYC and 600 mg/m2 of RTX with a maximum of 1000 mg). Following this therapy she was discharged on prednisolone of 30 mg daily which was tapered off gradually over five months. Six and eighteen months after the first infusion, she was retreated with the same dose of CYC and RTX. She tolerated the treatment well. There were no recorded infections or leucopenia. The patient's CRP and reticulocyte count have normalized; the most recent CRP was 0.53 mg/dL. There have been no further episodes of pulmonary hemorrhage, and she remains well without corticosteroid therapy two years following her last infusion.
Diagnosis of AAV was made according to definitions of the Chapel Hill Consensus Conference. The persistently elevated reticulocyte count prior to CYC/RTX therapy suggested that our patient's bleeding was a chronic process. Conventional treatment for this chronic condition includes 3 years of CYC and corticosteroids [2, 3].
RTX has recently been investigated as an alternative treatment for AAV [4–8], but two recent studies of RTX in AAV found no clear superiority to CYC [7, 9]. The combination of CYC and RTX has been used in an adult with pulmonary hemorrhage secondary to SLE ., and we have used it extensively in childhood rheumatic diseases [11–13]. We therefore hypothesized that it might be helpful in our patient with AAV-associated pulmonary hemorrhage. This treatment was given to achieve remission. Alternative therapies of uncertain benefit in this setting might include plasma exchange [14, 15], as well as azathioprine or mycophenolate mofetil .
Our patient's remission suggests that combination therapy with CYC and RTX may be effective in this condition. Further studies of the efficacy of this therapy in the treatment of AAV are needed.
A waiver of informed consent and waiver of Health Insurance Portability and Accountability Act authorization have been obtained through the local Institutional Review Board.
anti-neutrophil cytoplasmic antibody
anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis
systemic lupus erythematosus
Acknowledgements and Funding
There was no additional funding required for this case report.
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