Unicentric Castleman's Disease with an Unusual Clinical Behavior.

Castleman's disease is a rare clinicopathological condition characterized by hyperplasia of lymph nodes. We report the case of a 12-year-old boy who presented with painful oral and genital ulcers, who was assumed to have Behçet's disease. However, the patient did not show any clinical improvement on colchicine and systemic corticosteroids.