Immunoblastic lymphadenopathy with a high serum Yersinia enterocolitica titer. A case report

An old man with systemic illness initially treated with trimethoprim-sulfa, clinically, histologically and immunohistologically typical of immunoblastic lymphadenopathy (IBL) subsequently appeared to have a high serum Yersinia enterocolitica titer. The possibility that Y. enterocolitica has played some role in the course of IBL in this case is considered.