hepatic inflammatory pseudotumor

Inflammatorischer
Pseudotumor der Leber mit ringförmiger Konfiguration in der arteriellen (links) und portalvenösen (rechts) Kontrastmittelphase in der Computertomografie.
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Inflammatory
pseudotumor of the liver: a real imitator. Abdominal ultrasonography showed a well-defined heterogeneous mass situated in the right hepatic lobe. The texture of the mass was hypoechoic heterogeneous.
www.eurorad.org • CC by-nc-sa-4.0
Inflammatory
pseudotumor of the liver: a real imitator. The texture of the mass was hypoechoic heterogeneous, without hypervascularization at colour Doppler, with discrete posterior reinforcement.
www.eurorad.org • CC by-nc-sa-4.0
Inflammatory
pseudotumor of the liver: a real imitator. Showed a well-defined heterogeneous mass in the right hepatic lobe, measuring 11 cm greater axis, heterogeneous and hypodense in spontaneous contrast.
www.eurorad.org • CC by-nc-sa-4.0
Inflammatory
pseudotumor of the liver: a real imitator. Showed a well-defined heterogeneous mass in the right hepatic lobe, enhanced moderately to the periphery to the portal and tardy phases, including septa, with a mutilocular appearance, with liver perfusion disorders.
www.eurorad.org • CC by-nc-sa-4.0
Inflammatory
pseudotumor of the liver: a real imitator. Showed a well-defined heterogeneous mass in the right hepatic lobe, enhanced moderately to the periphery to the portal and tardy phases, including septa, with a mutilocular appearance, with liver perfusion disorders.
www.eurorad.org • CC by-nc-sa-4.0
Inflammatory
pseudotumor of the liver: a real imitator. Showed a well-defined heterogeneous mass in the right hepatic lobe, enhanced moderately to the periphery to the portal and tardy phases, including septa, with a mutilocular appearance, with liver perfusion disorders.
www.eurorad.org • CC by-nc-sa-4.0
Inflammatory
pseudotumor of the liver: a real imitator. Control CT after 4 weeks of corticosteroids treatment showed a good radiological response: decrease in tumour size.
www.eurorad.org • CC by-nc-sa-4.0
Inflammatory
pseudotumor of the liver: a real imitator. Control CT after 4 weeks of corticosteroids treatment showed a good radiological response: decrease in tumour size.
www.eurorad.org • CC by-nc-sa-4.0
Inflammatory
pseudotumor of the liver: a real imitator. Control CT after 4 weeks of corticosteroids treatment showed a good radiological response: decrease in tumour size.
www.eurorad.org • CC by-nc-sa-4.0
Inflammatory
pseudotumor of the liver: a real imitator. Control CT after 4 weeks of corticosteroids treatment showed a good radiological response: decrease in tumour size.
www.eurorad.org • CC by-nc-sa-4.0
Multiple
hepatic inflammatory pseudotumors with elevated alpha-fetoprotein and alpha-fetoprotein lectin 3 fraction with various PET accumulations: a case report. Contrast-enhanced computed tomography (CT) revealed the presence of lesions in the patient’s liver. a A low-density mass, 24 mm in size, in segment III on plain CT. b Enhancement of the lesion in the early phase was noted. c In the late phase, washout was observed. The tumor was in contact with the left hepatic vein (LHV). d The tumor in segment VIII was not clear on plain CT. e An 8-mm tumor was also present in segment VIII of the liver showing contrast enhancement. f Washout was noted in the delayed phase
surgicalcasereports.springeropen.com • CC-by-4.0
Multiple
hepatic inflammatory pseudotumors with elevated alpha-fetoprotein and alpha-fetoprotein lectin 3 fraction with various PET accumulations: a case report. Fluorine-18-fluorodeoxyglucose positron emission tomography (FDG-PET) findings. a The segment III lesion appeared abnormal on FDG-PET. b The segment VIII lesion did not show an abnormal uptake
surgicalcasereports.springeropen.com • CC-by-4.0
IgG4-related
disease • IgG4-related autoimmune cholangitis, pancreatitis, and pseudotumor - Ganzer Fall bei Radiopaedia
Hartung M, IgG4-related autoimmune cholangitis, pancreatitis, and pseudotumor. Case study, Radiopaedia.org (Accessed on 27 Nov 2022) https://doi.org/10.53347/rID-99511 • CC by-nc-sa 3.0 (modified)
Radiopaedia • CC-by-nc-sa 3.0 • de

Hepatic inflammatory pseudotumors (IPT), also known as xanthogranulomas or plasma cell granulomas of the liver, are rare benign hepatic lesions.

Epidemiology

Most common in young adults with males affected more than females .

Pathology

Etiology is unknown .

Macroscopic appearance

Hepatic inflammatory pseudotumor is often seen as a well-circumscribed, encapsulated inflammatory mass.

Histology

Hepatic inflammatory pseudotumor is characterized by a large population of polyclonal plasma cells with a variable amount of fibrosis, foamy histiocytes, and other chronic inflammatory cells .

Associations
Subtypes
  • hepatic parenchymal inflammatory pseudotumor (more common)
  • biliary inflammatory pseudotumor 

Radiographic features

Radiological findings of hepatic inflammatory pseudotumor are not characteristic and definitive diagnosis requires needle biopsy (sometimes insufficient ) or surgery .

CT

In most reported cases, they appear as hypoattenuating masses with a variable degree of hepatic enhancement .

MRI
Signal characteristics
  • T1: hypointense
  • T2: hyperintense
  • T1C+: heterogeneous enhancement
Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu inflammatorischer Pseudotumor der Leber:
inflammatorischer
Pseudotumor
pediatricimaging.org • CC-by-nc-sa 4.0