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Fetal outcomes after rituximab exposure in women with autoimmune vasculitis
  1. William F Pendergraft III1,2,3,
  2. Martina M McGrath3,4,
  3. Andrew P Murphy2,3,
  4. Patrick Murphy3,
  5. Karen A Laliberte2,3,
  6. Michael F Greene5,
  7. John L Niles2,3
  1. 1Joint Nephrology Fellowship Program, Brigham and Women's Hospital (BWH) and Massachusetts General Hospital (MGH), Boston, Massachusetts, USA
  2. 2Division of Nephrology, Department of Medicine, MGH, Boston, Massachusetts, USA
  3. 3Vasculitis and Glomerulonephritis Clinic, MGH, Boston, Massachusetts, USA
  4. 4Renal Division, Department of Medicine, BWH, Boston, Massachusetts, USA
  5. 5Department of Obstetrics and Gynecology, MGH, Boston, Massachusetts, USA
  1. Correspondence to Dr John L. Niles, Division of Nephrology, Department of Medicine, Massachusetts General Hospital (MGH), 151 Merrimac Street, Boston, MA 02114-4719, USA; jlniles{at}

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Rituximab is an approved B-lymphocyte depleting agent for induction of remission in patients with granulomatosis with polyangiitis and microscopic polyangiitis.1 ,2 Unlike cyclophosphamide, rituximab is not known to interfere with fertility and appears to be a safe and effective alternative. Pregnancy outcomes after maternal exposure to rituximab have been described,3 primarily in women with lymphoma, rheumatoid arthritis and lupus, but little is known about the impact of rituximab exposure on fetal outcomes, and more specifically, fetal B-lymphocyte populations among women with vasculitis. We performed a retrospective analysis of women with vasculitis who received rituximab in our centre and who achieved pregnancy, and their resultant offspring.

While receiving rituximab, women were counselled extensively to avoid pregnancy. Urine levels of human chorionic gonadotropin were measured and negative before each dose. …

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