Adult-Onset PFAPA Syndrome: Successful Management with Colchicine.

BACKGROUND Periodic fever, aphthous stomatitis, pharyngitis, and cervical adenitis (PFAPA) syndrome is an autoinflammatory fever syndrome primarily seen in children under age 5 years, and its etiology is unknown. Most cases are resolved by the age of 10 years, and it is rare in adults. PFAPA is characterized by recurrent episodes of fever associated with pharyngitis, stomatitis, and cervical adenitis, although not all clinical features are present at initial evaluation. Diagnosis is made clinically, as there are no specific biomarkers available. Treatment includes prednisone, colchicine, interleukin-1 blockers, and tonsillectomy. We report a case of adult-onset PFAPA syndrome that responded to colchicine. CASE REPORT A 22-year-old woman presented to the Rheumatology Clinic for evaluation of recurrent fevers associated with sore throat and enlarged painful cervical lymph nodes. She was symptom-free between the episodes. Workup for infectious causes and autoinflammatory/autoimmune diseases was unremarkable. Various differential diagnoses were considered, due to her unusual presentation. After all were ruled out, PFAPA was diagnosed based on her symptoms, and she started steroids, to which she had a dramatic response and resolution of symptoms. She was then transitioned to oral colchicine, which significantly decreased flare frequency. CONCLUSIONS Being aware of PFAPA syndrome in adults is vital. A timely diagnosis can significantly improve a patient's quality of life. This case highlights the importance of considering PFAPA syndrome in the differential diagnosis of periodic febrile illnesses in adults and the role of Colchicine as prophylaxis. Larger studies are needed to understand etiopathogenesis better and develop other effective therapeutics.