Neonatal lupus erythematosus is a rare, passively acquired autoimmune disease, caused by maternal autoantibodies. The most common manifestations are skin rash and congenital heart block. Cutaneous manifestations may be present at birth, but often develop within a few weeks after delivery. Congenital heart block may present as bradycardia in utero or during physical examination at birth. Approximately 40-60% of ...