Mondo Description BENTA disease (B cell Expansion with N F-N:B and T cell Anergy) is a very rare congenital immune deficiency disorder. The main symptoms include spleen enlargement (splenomegalia) and frequent ear, sinus, and lung infections early in life. Some patients can present with molluscum contagiosum or chronic Epstein-Barr virus (EBV) infection. Blood exams show alterations of several immune cells with very high numbers of polyclonal B cell lymphocytos (above 2200/N<l) and few memory B cells. Other findings are low levels of IgM in blood and poor antibody responses to specific vaccines. BENTA disease is caused by mutations in the CARD11 gene. There is no established treatment, but some patients have their spleen removed and there is one case of a hematopoietic stem cell transplantation with good results.

Uniprot Description An autosomal dominant condition characterized by onset in infancy of splenomegaly and polyclonal expansion of B cells, resulting in peripheral lymphocytosis. Affected individuals also show mild immune dysfunction, including some defective antibody responses and T-cell anergy. There may be a predisposition to the development of B-cell malignancy.