Infant brachial neuritis following a viral prodrome: a case in a 6-month old child and review of the literature

Introduction: Brachial neuritis, commonly known as Parsonage-Turner syndrome, affects two to three people per 100,000 and presents with pain and weakness of the arm and shoulder. Brachial neuritis is uncommon in infants. Methods: Here, we present the case of a 6-month old female, who presented with right upper extremity weakness and paresis following a viral prodrome. We also present a summary of all reported cases of brachial neuritis in infants. Results: This is the youngest case of brachial neuritis diagnosed at our institution. The child was treated with prednisolone and physical therapy. The patient is now 16 months old and her symptoms have significantly improved. Conclusions: Brachial neuritis should be considered in the differential when an infant presents with sudden onset of upper limb weakness, following a viral prodrome. Finally, a genetic workup is suggested for patients with recurring episodes.