Persistent Hypogammaglobulinemia Following Anti-CD20 Therapy in a Patient with 22q11.2 Deletion Syndrome: A Case Report
22q11.2 deletion syndrome (22q11.2 DS) is one of the most common microdeletion syndromes, characterized by congenital anomalies and variable immune dysfunction secondary to thymic hypoplasia. The resulting immune dysregulation frequently predisposes affected individuals to autoimmune manifestations, including immun...