title: Primary actinomycosis in the liver.
abstract: We present a case of a 71-year-old female with actinomycosis in the liver, which is a rare region to be primarily affected with actinomycosis. The diagnosis was done histopathologically with a partially resected liver specimen taken during surgery for choledocholithiasis. There were no clinical signs of Actinomyces infection before surgery. The hepatic lesion was a 2 cm sized nodule with histological appearances of abscess-forming suppurative inflammation with fibrosis, in which eosinophilic radiate granules with peripheral clubs were found. The Brown-Brenn stain showed Gram-positive branched filamentous bacilli, which were revealed as acid-fastness by the Ziehl-Neelsen method of Putt's modification. These findings were considered to be consistent with actinomycosis of the liver.
authors.affiliation: Department of Pathology and Oncology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Hisaoka
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
authors.forename: J
authors.initials: J
authors.lastname: Haratake
authors.forename: A
authors.initials: A
authors.lastname: Horie
mesh_terms: D000196:Actinomycosis / Q000382:microbiology / Q000473:pathology*; D000368:Aged; D005260:Female; D006801:Humans; D008099:Liver / Q000382:microbiology / Q000473:pathology; D008100:Liver Abscess / Q000382:microbiology / Q000473:pathology; D008107:Liver Diseases / Q000382:microbiology / Q000473:pathology*