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- W2017621829 endingPage "1471" @default.
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- W2017621829 abstract "Autoimmune pancreatitis (AIP) is a benign inflammatory disease of the pancreas that mimics pancreatic malignancy both clinically and radiologically. The fine needle aspiration biopsy (FNAB) features of AIP have not previously been documented. We report our experience with AIP, highlight pitfalls, and perform a comprehensive analysis of the cytomorphologic features of this condition. We identified 16 patients with AIP, initially evaluated by endoscopic ultrasound (EUS)-guided FNAB, 11 of whom subsequently underwent a pancreatoduodenectomy. We compared these to a cohort of EUS-guided aspirates from ductal carcinoma of the pancreas (n = 16) and chronic pancreatitis, not otherwise specified (NOS) (n = 19). On all 51 cases, we semiquantitatively evaluated presence and atypia of ductal cells, presence and cellularity of stromal fragments, and inflammatory cells, type and distribution. Fifty percent (8 of 16) of the AIP cases presented as obstructive jaundice. EUS and CT scan showed mass lesions in 10 and 6 cases, respectively. There were three false-positive cytologic diagnoses, an adenocarcinoma, a solid-pseudopapillary tumor and a mucinous neoplasm. Ductal epithelium was inconspicuous and was seen in 6 cases. The FNAB samples showed background lymphocytes in three AIP cases, a feature absent in the control cohort. Stromal fragments with embedded lymphocytes (greater than 30 per 60x) were seen in 37.5% of AIP cases and only rarely with adenocarcinoma (12.5%) and pancreatitis, NOS (0%). The cellularity of stromal fragments was significantly higher in AIP than in the control group. The presence of stromal fragments of high cellularity with a lymphoid infiltrate in conjunction with clinical and radiology findings could potentially both establish a diagnosis of AIP and exclude carcinoma, thus preventing pancreatic resection." @default.
- W2017621829 created "2016-06-24" @default.
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- W2017621829 date "2005-11-01" @default.
- W2017621829 modified "2023-10-18" @default.
- W2017621829 title "Endoscopic Ultrasound Guided Fine Needle Aspiration Biopsy of Autoimmune Pancreatitis" @default.
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- W2017621829 doi "https://doi.org/10.1097/01.pas.0000173656.49557.48" @default.
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