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IgG4-related disease for the hematologist.
Hematology Am Soc Hematol Educ Program
December 2024
Division of Hematology, University of British Columbia, Vancouver, British Columbia, Canada; and Division of Hematology, Dalhousie University, Halifax, Nova Scotia, Canada.
Immunoglobulin G4-related disease (IgG4-RD) is an immune-mediated disease with many important manifestations in hematopoietic and lymphoid tissue. IgG4 is the least naturally abundant IgG subclass, and the hallmark feature of IgG4-RD is markedly increased IgG4-positive plasma cells (with an IgG4 to IgG ratio >40%) in affected tissue, along with elevated polyclonal serum IgG and IgG4 in most patients. Histological diagnosis is essential, and other key features include storiform fibrosis, lymphoplasmacytic infiltrate, tissue eosinophilia, and obliterative phlebitis.
View Article and Find Full Text PDFReactive Spindle Cell Nodule in the Pancreas Post Fine Needle Aspiration: A Case Report and Literature Review.
Cureus
October 2024
Pathology and Laboratory Medicine, UI Health/University of Illinois at Chicago, Chicago, USA.
Reactive spindle cell nodules (RSCNs) that occur after fine needle aspiration (FNA) are commonly documented in the literature. They are benign proliferation of spindle cells with some mitotic figures and nuclear pleomorphism that arise after tissue injuries like FNA. These lesions are non-capsulated and surrounded by parenchyma of organ tissue.
View Article and Find Full Text PDFPictorial Review of Rare Pancreatic Tumors and Tumor-like Lesions: Radiologic-Pathologic Correlation.
Medicina (Kaunas)
October 2024
Medical Science Research Institute, Kyung Hee University Hospital, Seoul 02447, Republic of Korea.
Rare pancreatic tumors and non-neoplastic tumor-like lesions present a diagnostic challenge due to their uncommon occurrence and overlapping imaging characteristics with more prevalent pancreatic neoplasms. Advances in imaging technologies and diagnostic criteria have contributed to increased detection of these rare entities in clinical practice. This pictorial review focuses on the radiologic-pathologic correlation of rare pancreatic tumors, including colloid carcinoma, acinar cell carcinoma, pancreatoblastoma, primary pancreatic lymphoma, and non-neoplastic tumor-like lesions such as hamartomas and inflammatory pseudotumors.
View Article and Find Full Text PDFPancreatic Pseudotumor: serendipitous discovery of pancreatic actinomycosis.
Gastrointest Endosc
October 2023
Chairman & Chief of Gastroenterology, AIG Hospitals, Hyderabad.
Coexistence of Pancreatic Neuroendocrine Tumor and Pseudotumor: Two Rare Lesions.
Int J Surg Pathol
September 2024
Department of General Surgery, Private Buca Hospital, Tınaztepe University, İzmir, Turkey.
Neuroendocrine tumors and pseudotumors of the pancreas are 2 separate rare lesions. Neuroendocrine tumors originate from neuroendocrine cells, but many different factors have been suggested for the origin of pseudotumors. As the first reports of these 2 distinct entities found in a single patient have been published, our aim is to present the imaging and pathological characteristics of these entities.
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