Neither t(11;18)(q21;q21) chromosomal translocation nor API2-MALT1 chimeric transcript was found at diagnosis.     ///    It appears necessary to clarify whether atopy might play a role in the pathogenesis of API2-MALT1(-) BALT lymphoma for HIV(-) young patients who do not exhibit any other antecedent chronic antigenic stimulations..     ///    "Human immunodeficiency virus (HIV)-negative, API2-MALT1 fusion-negative bronchus-associated lymphoid tissue (BALT) lymphoma in a young male.. "