Veiled Vasculitis in a 14-Year-Old Presenting With Chest Pain and Polyarthralgias.

Granulomatosis with polyangiitis (GPA) is a rare, small-vessel vasculitis that often presents with upper and lower respiratory tract symptoms along with nonspecific symptoms, including fever and weight loss. Although it is more likely to present in adulthood, GPA can present at all ages and affect multiple organ systems, making its recognition exceedingly difficult and leading to delayed diagnosis. This is particularly deleterious in the pediatric population in which delayed diagnosis and treatment are associated with a significantly worse prognosis, significant hematologic complications, and irreversible organ damage.