Nocardiosis is an acute, subacute, or chronic infection, most of tsn beginning in the lung, and usually affects the immunocompromised host. Nocardial infections are not rare
in the United Slates, 500 to 1000 cases are recognized each year, but rarely reported in Korea. Disorders associated with cellular immune dysfunction are the maior risk factors
for nocardiosis. We report one casts of brain and retroperitoneal abscess caused by Nocardia asteroides in patient who has had a chronic lymphocytic leuksmia and diabetes mellitus, with a review of the relevant literature.