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Sclerosing mesenteritis, also known as mesenteric panniculitis or retractile mesenteritis , is an uncommon idiopathic disorder characterized by chronic non-specific inflammation involving the adipose tissue of the bowel mesentery. It is often considered in the spectrum of autoimmune disease 21.
Pathology. The pathogenic micro-organisms are thought to gain access via intestinal lymphatics and then multiply in mesenteric lymph nodes. On gross pathology, lymph nodes are enlarged and soft. On microscopy, there is non-specific hyperplasia and when suppurative, there is necrosis and pus.
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Carcinoid tumors are a type of neuroendocrine tumor that can occur in a number of locations. Carcinoid tumors arise from endocrine amine precursor uptake and decarboxylation (APUD) cells that can be found throughout the gastrointestinal tract as ...
Histopathology of resected sigmoid colon: Sclerosing mesenteritis. IgG4/IgG ratio is around 20%. 15 reactive lymph nodes. No colonic malignancy is seen. Microscopy: Sections from the tumor area show spindle cell proliferation extending from the muscularis propria to serosa.
Mesenteric desmoid tumors are a subtype of desmoid tumors. Pathology Desmoids are cytologically bland tumors that appear as infiltrative, well-demarcated tumors that are derived from musculo-aponeurotic structures throughout the body. Associa...
Omental cake refers to infiltration of the omental fat by material of soft-tissue density. The appearances refer to the contiguous omental mass simulating the top of a cake. Masses on the peritoneal surfaces and malignant ascites may also be pres...
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IgG4-related disease (IgG4-RD) is a systemic disease that is characterized by fibroinflammatory infiltration of various organs induced by plasma cells that express IgG4 (immunoglobulin G subclass 4). Terminology Since 2012, IgG4-related disease...