The psoas abscess is an entity, sometimes forgotten in our daily practice, because of infrequency and difficulties in diagnosis. Primary psoas abscess is very rare and grampositive micro-organisms account for more than 80% of the cases. Our case, a 62-year-old man was admitted with a 5-year history of back pain and fever. Physical examination was normal, except a palpable hepatomegaly with a mild tenderness over his lower right abdominal quadrant. The Brucella agglutination test was strongly positive with a titre of 1/640, as Rose Bengal Spot test. Blood cultures for brucella were positive on the fourth day and became negative, as the specific therapy started. Further examination with ultrasonography and computed tomography revealed an abscess of 40 1 75 mm in the psoas muscle. Complete resolution of symptoms achieved within 6 weeks. Although clinical presentation of psoas abscesses is often similar and non-specific, early aetiological diagnosis is extremely important, because of high achievement with appropriate antibiotic regimens. Brucellar psoas abscess seems very rare even in Turkey, where Brucella is still highly endemic. Such a case has not been previously reported from Turkey, as far as we know.Most psoas abscesses are secondary. They occur when infection follows extension from an adjacent focus, mainly bone, genitourinary or intestinal tracts. In European countries, intestinal micro-organisms are the major causative agents, whereas Mycobacterium tuberculosis is the most common organism in Turkey (1).Primary psoas abscess is an infrequent disease of difficult diagnosis, which occurs after direct inoculation or haematogenous spread from distant foci. Numerous micro-organisms have been reported to be isolated, but Staphylococcus aureus accounts for more than 80% of primary cases (2). Other causative micro-organisms including Brucella are found to be very rare. Although a literature review revealed eight cases of Brucellar psoas abscess, only three of them were in English literature (3-9). To our knowledge, such a case has not been previously reported from Turkey.
C A S E R E P O R TOur case, a 62-year-old man was admitted with a 5-year history of fever and back pain, in which symptoms was developed gradually. He had malaise, weight loss, anorexia and nocturnal pyrexia, accompanying with chills. His past medical history was normal. He had no contact with infected animals. He lived in an urban city and had no history of ingestion of contaminated dairy products such as fresh milk and cheese, which is known to be the most common cause of transmission in our country. On admission, he had a fever of 39.3˚C with stable vital signs. Physical examination was normal, except a palpable hepatomegaly with a mild tenderness over his lower right abdominal quadrant. Routine haemogram revealed a mild leukocytosis of 10,200 cells/ml. The erythrocyte sedimentation rate was normal. Brucella agglutination test was strongly positive with a serum agglutination test titre of 1 : 640. Other routine laboratory investigations were no...