Neonatal lupus erythematosus syndrome: late detection of isolated heart block.

Heart block in neonatal lupus erythematosus is typically complete and detected in utero or in the neonatal period. We describe a child diagnosed with incomplete heart block at 9 years of age whose mother was diagnosed with Sjögren's syndrome and anti-Ro(SSA) 2 years after diagnosis of heart block in her child. This is the first case of late detection of incomplete heart block in a child felt to be causally related to the presence of anti-Ro(SSA) in the mother.