[Gardasil®-induced erythema nodosum]

Area of Science:

• Dermatology
• Immunology
• Public Health

Background:

• Erythema nodosum is an inflammatory condition affecting subcutaneous fat, often seen in young women.
• The human papillomavirus (HPV) vaccine is recommended for young females to prevent oncogenic HPV infections.
• Adverse events following vaccination require careful evaluation to balance risks and benefits.

Observation:

• A 16-year-old female developed erythema nodosum after receiving the Gardasil® vaccine.
• The vaccine targets HPV types 6, 11, 16, and 18, which are associated with cervical cancer and genital warts.

Findings:

• The case suggests a potential, though rare, association between HPV vaccination and erythema nodosum.
• Erythema nodosum is a known panniculitis, an inflammation of the fat layer beneath the skin.

Implications:

• This adverse effect is unlikely to be a contraindication for HPV vaccination.
• The established benefits of HPV vaccination in preventing HPV-related cancers outweigh the risk of this rare side effect.
• Continued monitoring for adverse events post-vaccination is crucial for public health surveillance.