Abstract
Behçet's disease (BD) is a chronic inflammatory disorder characterized by recurrent oral aphthous ulcers, genital ulcers, skin lesions, and uveitis. Recent genetic studies have identified monogenic diseases with phenotypes resembling BD, including RELA-associated inflammatory disease (RAID), Haploinsufficiency of A20 (HA20), and otulipenia. The RelA gene encodes the RELA protein, which is involved in the nuclear factor kappa B (NF-κB) signaling pathway that regulates the transcription of genes associated with cell survival, apoptosis, and immune responses. In RAID, dysfunction of the NF-κB pathway leads to reduced cell survival and symptoms of BD, such as recurrent fever, chronic mucocutaneous ulceration, arthralgia, and colitis. Herein, we report a pediatric patient who presented with recurrent, severe oral and genital ulcers from the age of five years and was diagnosed with RAID following a documented RelA gene mutation. The patient responded to a combination of corticosteroids, colchicine and methotrexate. RAID should be considered in the differential diagnosis of patients with early onset recurrent fever and mucosal ulcerations.