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【求助】随老马版主同问，自身免疫性胰腺炎，胰腺周围的“套袖征”形成机理是什么

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问题已解决悬赏丁当:10

如题，其形成机理是什么，病理成分是什么，为何CT、MRI上无强化,T1、T2均呈低信号

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2011-04-13 21:05 浏览 : 1891 回复 : 1

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The other morphologic abnormality we observed was a capsulelike rim that surrounded the pancreas, which was seen in four of five patients.This capsulelike rim showed a well-defined smooth margin. Takahashi et al. [12]observed the same capsulelike rim on CT and considered it to represent a fluid collection around the pancreas. Another possibility is that the capsulelike low-density band seen on CT represents a phlegmon that can also be seen in acute pancreatitis. However, this capsulelike rim showed delayed enhancement on dynamic imaging and was hypointense on 12-weighted MR images, suggesting fibrous tissue rather than a fluid collection or phlegmon. No patient
underwent pancreatectomy in our study, and therefore no histologic correlation with this capsulelike rim could be obtained. However, in their resected specimen Kawaguchi et al. [4] found an inflammatory process widely and intensely involving the contiguous soft tissues. This histopathology could explain the appearance
of a capsulelike rim on CT scans and MR images. That is, an inflammatory process that contains fibrous changes involving the peripancreatic adipose tissue may correspond to the capsulelike rim on CT and MR images. No
other pancreatic abnormalities with this capsulelike rim have been reported, suggesting that this may be a specific finding in patients with autoimmune pancreatitis.

低密度（信号）影被认为是胰周脂肪组织的炎性过程，内包含纤维组织，而不是胰周积液，因其有延时强化

附文献一篇，老弟自己看吧

当然，如果无强化是不是正处于渗液过程，而无纤维化形成（我的推测，及强化与否与炎症发展阶段相关）

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2011-04-20 16:33

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【求助】随老马版主同问，自身免疫性胰腺炎，胰腺周围的“套袖征”形成机理是什么

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【求助】随老马版主同问，自身免疫性胰腺炎，胰腺周围的“套袖征”形成机理是什么

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