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Neonatal lupus erythematosus
Insights
Neonatal lupus erythematosus (LE) in infants presents with skin lesions and photosensitivity. Maternal Ro Sjögren's syndrome A antigen (SSA) antibody presence is a key serologic marker for this condition.
Area of Science:
- Pediatric Dermatology
- Immunology
- Neonatology
Background:
- Neonatal lupus erythematosus (LE) is a rare autoimmune condition affecting newborns.
- It is associated with maternal autoantibodies, primarily anti-Ro (SSA) and anti-La (SSB).
- Congenital heart block is a known complication, but cutaneous manifestations are also significant.
Observation:
- Three infants diagnosed with neonatal LE exhibited distinct skin lesions: sharply marginated erythematous papules and plaques.
- Photosensitivity was observed in two infants, and the third infant's rash appeared on a sun-exposed area.
- No cases of congenital heart block were noted in this cohort.
Findings:
- All three infants and their mothers tested positive for Ro Sjögren's syndrome A antigen (SSA) antibody.
- The presence of transplacentally acquired Ro (SSA) antibodies correlated with the development of neonatal LE.
- Cutaneous manifestations and photosensitivity were prominent features in these cases.
Implications:
- This study reinforces the role of Ro (SSA) antibody as a reliable serologic marker for neonatal LE.
- Early identification of neonatal LE is crucial for managing photosensitivity and potential long-term dermatological effects.
- Understanding the link between maternal antibodies and neonatal outcomes aids in risk assessment and clinical management.
Abstract:
Three infants with neonatal lupus erythematosus (LE) had characteristic sharply marginated erythematous papules and plaques without congenital heart block. Two of the infants were definitely photosensitive, while the third infant's eruption began on a photoexposed area. All three infants and their mothers were positive for Ro Sjögren's syndrome A antigen (SSA) antibody. These three infants have additional evidence supporting the concept that transplacental passage of Ro (SSA) antibody is a serologic marker for neonatal LE.