ArticleClinical journal of gastroenterology2023
IgG4-related hepatic inflammatory pseudotumor in a patient with serum IgG4-negative type 1 autoimmune pancreatitis.
Article in Clinical journal of gastroenterology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 1 citations in OpenAlex.
- Spontaneous regression of colorectal liver metastasis with coexisting IgG4-rich inflammatory pseudotumor-like changes: a case report.Clinical journal of gastroenterology · 2026Article
- Case Report: Serum IgG4-negative multifocal IgG4-related hepatic inflammatory pseudotumor: dissociation between circulating IgG4 and local immune activation.Frontiers in immunology · 2026Article
- Clinicopathological features of type 1 autoimmune pancreatitis without elevated serum IgG4 level.Scientific reports · 2025Article
- Tumor in the liver: Six inflammatory pseudotumor patient.Turkish journal of surgery · 2024Article
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10 authors at 3 institutions in 1 country.
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Abstract
IgG4-related disease (IgG4-RD) can cause heterogeneous lesion in various organs. Serum IgG4 levels are useful in monitoring patients with IgG4-RD; however, when it is negative, more careful observation is required. A 58-year-old woman who had been diagnosed with serum IgG4-negative type 1 autoimmune pancreatitis (AIP) 3 years prior visited our hospital for the evaluation of a liver tumor. She had visited a nearby hospital 1 month prior with complaints of a swelling in her right neck, and histological examinations were suggestive of IgG4-related sialadenitis. A positron emission tomography scan showed fluoro-deoxy-glucose accumulation in her right liver lobe; therefore, she was referred to our hospital. Liver tumor biopsy showed inflammatory cell infiltration and storiform fibrosis, without histological findings indicative of a malignancy. Many IgG4-positive cells were detected in immunostaining; thus, an IgG4-related hepatic inflammatory pseudo-tumor was diagnosed. After increasing in steroid dosage, the patient remained recurrence-free with 2 years. To our knowledge, this is the first report of mass-forming IPT for serum IgG4-negative type 1 AIP. Occasionally, IgG4-related IPT may appear in the periphery of the liver, and serum IgG4-negative cases should be more carefully observed because serum IgG4 is not an indicator.
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