Investig Magn Reson Imaging.  2024 Mar;28(1):49-54. 10.13104/imri.2023.0030.

Unique Imaging Features in Hepatic Actinomycosis Accompanied by an IgG4-Related Inflammatory Pseudotumor: A Case Report

• Song H
• Ju MJ
• Kim SH

• KMID: 2554475
• DOI: http://doi.org/10.13104/imri.2023.0030

Abstract

Hepatic actinomycosis is a rare condition, accounting for 15% and 5% of all abdominal and actinomycosis cases, respectively. Here, we describe a case of hepatic actinomycosis accompanied by immunoglobulin G4-related inflammatory pseudotumors. To the best of our knowledge, only two such cases have been reported to date. Here, we present the case of a 72-year-old male patient. Computed tomography and magnetic resonance imaging revealed a hepatic lesion that did not follow anatomical boundaries. The lesion showed arterial phase peripheral hyperenhancement, progressive enhancement of the central portion, sharply demarcated margins, and a radial stripe pattern. The final diagnosis for this hepatic lesion was hepatic actinomycosis accompanied by immunoglobulin G4-related inflammatory pseudotumor.

Keyword

Actinomycosis; Hepatic actinomycosis; Immunoglobulin G4-related disease; Liver