Neonatal Sweet syndrome associated with a rectovestibular fistula in a 5-week-old female: A case report

Sweet syndrome is an uncommon neutrophilic dermatosis in the pediatric population. As in adults, it is frequently associated with underlying conditions, including infectious diseases, neoplasias, inflammatory bowel disease, and autoimmune or autoinflammatory disorders. Genetic causes, such as chronic atypical neutrophilic dermatosis with lipodystrophy and elevated temperature syndrome, should also be considered, particularly in neonates. We report a case of a 5-week-old female infant with a confirmed Sweet syndrome associated with a rectovestibular fistula—an unusual association, with only three cases previously reported in the literature. To our knowledge, this is the first reported case in a non-Japanese neonate.