Vaccine-Induced Lichen Planus in a 12-Year-Old Patient: A Rare Pediatric Case.

We report a rare case of vaccine-induced lichen planus (LP) in a 12-year-old male patient who developed generalized pruritic, violaceous, flat-topped papules and plaques two weeks after receiving a tetanus vaccine following a puncture wound. Clinical evaluation, dermoscopic examination showing Wickham striae and follicular hyperkeratosis, and histopathology confirmed the diagnosis. Vaccine-induced LP remains an uncommon but possible immune-mediated adverse reaction. Dermoscopy proved valuable for non-invasive diagnosis, aiding in distinguishing LP from other dermatologic conditions. This case emphasizes the importance of considering vaccine-induced LP in pediatric patients presenting with new-onset lesions post-vaccination and highlights the role of dermoscopy in early recognition and management.