Abstract:
BACKGROUND:Autoimmune pancreatitis has been designated as sclerosing pancreatocholangitis, because this disease shows a high prevalence of bile-duct lesions. We present herein the clinical characteristics of unusual cases that show dominant bile-duct lesions and mimicking infiltrating hilar cholangiocarcinomas. METHODS:Clinical and pathologic findings of 3 patients with immunoglobulin (Ig) G4 related sclerosing cholangitis who had no apparent pancreatic lesions comparable with autoimmune pancreatitis were analyzed. OBSERVATIONS:All patients were middle-aged or elderly individuals with slightly elevated serum IgG4 concentrations and showed long-segment narrowing of the bile-duct system, mimicking infiltrating hilar cholangiocarcinoma without significant pancreatic change. The first patient was treated with a corticosteroid, resulting in amelioration of the narrowing of the bile duct. The second patient underwent surgery based on a diagnosis of cholangiocarcinoma. In the third patient, the bile-duct stricture reversed spontaneously 1 month after the drainage procedure. Pathologic findings of the bile ducts for all patients disclosed significant lymphoplasmacytic infiltration, including abundant IgG4-bearing plasma cells. CONCLUSIONS:The use of IgG4 immunostaining in biopsy specimens of the bile duct may identify the presence of corticosteroid-responsive lymphoplasmacytic sclerosing cholangitis.
journal_name
Gastrointest Endoscjournal_title
Gastrointestinal endoscopyauthors
Hamano H,Kawa S,Uehara T,Ochi Y,Takayama M,Komatsu K,Muraki T,Umino J,Kiyosawa K,Miyagawa Sdoi
10.1016/s0016-5107(05)00561-4keywords:
subject
Has Abstractpub_date
2005-07-01 00:00:00pages
152-7issue
1eissn
0016-5107issn
1097-6779pii
S0016-5107(05)00561-4journal_volume
62pub_type
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