[Infective endocarditis in a patient with multiple myeloma. A case report].

A case of a 59 year old male with infective endocarditis is presented. Antibiotic therapy seemed effective, however, inflammation laboratory parameters increased two weeks after clinical improvement and body temperature normalisation. Subsequent extensive laboratory investigations revealed multiple myeloma. The patient underwent successful aortic valve replacement and received pharmacological therapy for multiple myeloma. Difficulties in diagnosing and treatment of patients with infective endocarditis who have other concomitant diseases, are discussed.