Treatment of Netherton Syndrome in Pediatrics with Upadacitinib.

ABSTRACT

Background: Netherton syndrome, a rare autosomal recessive genetic disease, lacks effective treatment options. This article presents a novel case of successful Upadacitinib therapy in a 14-year-old boy with Netherton syndrome. Case Presentation A 14-year-old male with a lifelong history of dry skin, erythema, scaling, itching, and notable body odor was evaluated. These symptoms, accompanied by irregular hair growth and delayed development, prompted an initial diagnosis of atopic dermatitis at a local hospital. Treatment with antihistamines, moisturizers, and topical corticosteroids failed to alleviate systemic manifestations of red patches and persistent itching. Seeking further evaluation, the patient was presented to our center. Upon examination, the characteristics of "bamboo hair" and "golf tee sign" were observed microscopically in the patient's hair. Whole exome sequencing identified a paternally inherited mutation in the SPINK5 gene, confirming Netherton syndrome. No mutations were found in the mother. Despite initial positive responses to Secukinumab and Dupilumab, therapeutic efficacy waned over time. Results and Conclusions: Initiation of Upadacitinib at a daily dose of 15 mg yielded significant therapeutic benefits within a short timeframe. This study marks the first documented use of Upadacitinib in pediatric Netherton syndrome treatment. This case highlights the efficacy of Upadacitinib in treating Netherton syndrome, particularly in pediatric patients. Further studies are warranted to elucidate its long-term effects and optimal dosing regimens.