When would you administer the next maintenance dose of rituximab in a patient with ANCA glomerulonephritis who last received an infusion six months ago and has low immunoglobulin levels and an undetectable CD-19 cell count?  

If an ANCA vasculitis patient is in remission and has no infections, I usually in clinical practice do not check Immunoglobulin levels or CD19/20 levels either. They should only be done in patients with recurrent sinus infections or Pneumonia. If the patient with recurrent infections has low Immunog...