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Liver and biliary system, pancreas and spleen
Published in A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha, Clark’s Procedures in Diagnostic Imaging: A System-Based Approach, 2020
A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha
The pancreas is low to intermediate signal intensity on T2-weighted images, with pathological tissue presenting as isointense or hyperintense. On T1-weighted images with fat suppression the pancreas is the highest signal intensity of the abdominal organs. Adenocarcinoma and pancreatitis are lower signal than normal pancreas on T1 and there is greater signal on enhancement of normal pancreatic tissue with contrast than in cancerous or necrotic tissue. Pancreatic adenocarcinoma accounts for ≈90% of pancreatic tumours. MRI appearances of less common tumours on T2-weighted images and the pattern of contrast enhancement can help to characterise pancreatic tumours. In pancreatitis the formation of pseudocysts is a common finding. Pseudocysts result from fat necrosis and the formation of granulation tissue and a fibrous capsule enclosing pancreatic secretions and MRI is better than CT at demonstrating the complex internal structure of the pseudocyst [23]. MRI can establish the solid and fluid content of the inflammatory collection, which guides which lesions are amenable to percutaneous drainage. In addition, MRCP may be performed to identify choledocholithiasis as a cause of acute pancreatitis or for examination of the pancreatic duct [24].
Diagnosis and management of implant debris-associated inflammation
Published in Expert Review of Medical Devices, 2020
Stuart B. Goodman, Jiri Gallo, Emmanuel Gibon, Michiaki Takagi
In the case of a popliteal pseudocyst, the TKA is addressed first. The procedure is managed according to the particular local findings, scope, and type of bone defects. The popliteal pseudocyst is usually emptied successfully indirectly, during a revision through access of the posterior capsular area. This approach enables the surgeon to avoid an excision of the pseudocyst from an independent posterior surgical approach at the end of surgery.