05 November 2015 : Case report
A Patient with Autoimmune Pancreatitis Type 1 with Previously Known Lymphadenopathy, Both in the Context of IgG4-related Disease
Unusual clinical course, Challenging differential diagnosis, Diagnostic / therapeutic accidents, Unusual setting of medical care, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)Fazil M. AlidjanABCDEF, Faiz KarimDEF, Rob M. VerdijkCD, Joost W. van EsserB, Marianne J. van HeerdeB
Am J Case Rep 2015; 16:790-793
BACKGROUND: Autoimmune pancreatitis (AIP) is an important clinical pathologic concept of IgG-4-related disease. AIP is a rare cause of chronic pancreatitis, characterized by a fibroinflammatory process by lymphoplasmacytic infiltrates, storiform fibrosis, obliterative phlebitis, and increased IgG4+ plasma cells, leading to dysfunction of the pancreas. Affected patients with AIP frequently have disease affecting other organs or sites with similar histologic changes, elevated IgG4+ plasma cell infiltrate, and good response to corticosteroid therapy. These diseases often are not limited to the pancreas and the pancreas may not be involved at all.
CASE REPORT: We report a 62-year-old man with obstructive jaundice with pre-existent submandibular lymphadenopathy. Diagnosis of AIP was based on diagnostic criteria by the HISORT-criteria in combination with elevated IgG-4 serum levels. CT revealed a focal enlargement of the head of the pancreas, as well as mesenteric peripancreatic and mediastinal lymphadenopathy. He was treated with high-dose steroid in combination with azathioprine and showed good clinical response.
CONCLUSIONS: We report a case with pre-existent submandibular lymphadenopathy and obstructive jaundice based on AIP type 1, both in the context of IgG4-related disease.
Keywords: Antibodies, Anti-Idiotypic - immunology, Autoimmune Diseases - immunology, Biopsy, Diagnosis, Differential, Immunoglobulin G - immunology, Lymphatic Diseases - diagnosis, Pancreatitis, Chronic - immunology, Tomography, X-Ray Computed
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