Ro antibody: Ro antibody is present in a number of autoimmune diseases and can be present in non-affected persons. The number does not correlate. Following the Ro number is not helpful. Ro (SSA) testing should be done if lupus or Sjögren's are suspected or if a woman has an autoimmune disease and wants to get pregnant. Having the Ro antibody predisposes the baby to congenital heart block and neonatal lupus.
Answered 5/6/2018
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