title: [Primary hepatic actinomycosis: a case of inflammatory pseudotumor (case report)].
abstract: Actinomycosis is an uncommon chronic infection in which primary liver involvement accounts for 5% of all actinomycotic infections. Abdominal actinomycosis is a severe and progressive peritoneal infection due to an anaerobic gram-positive bacterium, Actinomyces israelii. The presence of a long-standing intrauterine device (IUD) is a well-known risk factor in young women. Although hepatic lesions are present in 15% of cases of abdominal actinomycotic infection, liver involvement in the majority of these cases is attributable to metastatic spread from other evident intraabdominal sites. Hepatic actinomycosis presents most commonly as a single abscess. However, hepatic actinomycosis can closely mimic a malignant tumor on clinical and radiological examination. Such lesions have been termed inflammatory pseudotumors. Tissue specimens for microscopic examination are necessary for diagnosis. We report a rare case of inflammatory pseudotumor of the liver caused by actinomycotic infection.
authors.affiliation: Ege Universitesi Tip Fakültesi, Radyodiagnostik Anabilim Dali, Izmir, Turkey.
authors.forename: Sadik
authors.initials: S
authors.lastname: Tamsel
authors.forename: Gülgün
authors.initials: G
authors.lastname: Demirpolat
authors.forename: Refik
authors.initials: R
authors.lastname: Killi
authors.forename: Nevra
authors.initials: N
authors.lastname: Elmas
mesh_terms: D000190:Actinomyces / Q000302:isolation & purification; D000196:Actinomycosis / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology; D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects*; D008107:Liver Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography