Inflammatory Arthritis following Hepatitis B Vaccination in an Infant

Area of Science:

• Pediatric rheumatology
• Vaccine safety
• Immunology

Background:

• Inflammatory arthritis in children can be idiopathic or infection-related.
• Post-vaccination inflammatory arthritis is rarely reported in pediatric populations.
• The hepatitis B vaccine is a common childhood immunization.

Observation:

• A 10-day-old infant presented with right lower extremity decreased movement and knee swelling.
• The infant received a hepatitis B vaccine in the right thigh at birth.
• Clinical presentation suggested inflammatory arthritis with a negative ANA but positive HLA B27.

Findings:

• The infant's symptoms resolved with ibuprofen treatment.
• Literature review revealed adult cases of reactive arthritis post-hepatitis B vaccination, often HLA B27 associated.
• This is the first reported pediatric case of inflammatory arthritis following hepatitis B vaccination.

Implications:

• Healthcare providers should consider post-vaccination inflammatory arthritis in infants presenting with joint swelling and pain.
• Awareness of this rare adverse event is crucial for timely diagnosis and management.
• Further research may be needed to understand the mechanism and incidence of vaccine-associated arthritis in children.