[Masshoff's disease].

Masshoff's disease (pseudotuberculous mesadenitis) was diagnosed in a 20-year-old male on the basis of histological investigation of surgically removed appendix and ileocaecal lymph nodes. The appendix was intact. Hyperplasia of lymphoid tissue with formation of small abscesses and karyorrhexis of neutrophils, but without giant polynuclear cells was histologically revealed in lymph nodes. Foci of fibrinoid necrosis were found in lymph node capsules. Serological test for pseudotuberculosis was strongly positive ( +).