CT Assessment of the Inferior Peripancreatic Veins

Yamada, Yoshitake; Mori, Hiromu; Kiyosue, Hiro; Matsumoto, Shunro; Hori, Yuzo; Maeda, Tohru

doi:10.2214/ajr.174.3.1740677

Cited by 57 publications

(39 citation statements)

References 18 publications

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“…Criterion B was defined based on the status of the jejunal trunk (JT) because JTs are exclusively visualized on thin-section helical CT and run across the PLX-Ⅱ: V-, normal JT; V+, stenosis or obstruction of the JT [30] . Tian et al [8] reported that neural plexus was invaded in 85% of pancreatic carcinoma, and that there was no correlation between carcinoma size and the incidence of carcinoma invasion to the PLX-Ⅱ.…”

Section: B Amentioning

confidence: 99%

CT and MR imaging patterns for pancreatic carcinoma invading the extrapancreatic neural plexus (Part II): Imaging of pancreatic carcinoma nerve invasion

Zuo

Tang²,

Zhang³

et al. 2012

WJR

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Computed tomography (CT) and magnetic resonance imaging (MRI) are excellent modalities which have the ability to detect, depict and stage the nerve invasion associated with pancreatic carcinoma. The aim o� this article is to review the CT and MR patterns o� pancreatic carcinoma invading the extrapancreatic neural plexus and thus provide use�ul in�ormation which could help the choice o� treatment methods. �ancreatic carcinoma is a common malignant neoplasm with a high mortality rate. There are many factors influencing the prognosis and treatment options �or those patients su��ering �rom pancreatic carcinoma, such as lymphatic metastasis, adjacent organs or tissue invasion, etc . Among these �actors, extrapancreatic neural plexus invasion is recognized as an important �actor when considering the management o� the patients.

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Section: B Amentioning

confidence: 99%

CT and MR imaging patterns for pancreatic carcinoma invading the extrapancreatic neural plexus (Part II): Imaging of pancreatic carcinoma nerve invasion

Zuo

Tang²,

Zhang³

et al. 2012

WJR

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“…With the advent of high resolution scanners, thin calibered pancreatic vessels can usually be well demonstrated, and in case of a pancreatic tumor they are carefully examined to detect or exclude vascular invasion. Dilatation of the pancreatic veins, especially peripancreatic veins, can indicate the extension of a pancreatic tumor to the neighboring structures, particularly to the duodenum (8). Nevertheless the only cause of dilated pancreatic veins is not a pancreatic tumor, and these enlarged vessels may also indicate anastomoses by-passing an obstructed vein or retroperitoneal or mesenteric portosystemic collaterals in portal hypertension.…”

Section: Discussionmentioning

confidence: 99%

Magnetic Resonans Imaging Of Intrapancreatic Collaterals in Portal Vein Thrombosis With And Without Cirrhosis

ÖZKAVUKCU¹

2013

Ankara Üniversitesi Tıp Fakültesi Mecmuası

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Aim: To evaluate the frequency of intrapancreatic collaterals in patients with cavernous transformation of the portal vein, in cirrhotic and non-cirrhotic groups.Materials and Methods: We evaluated MR angiography images of 41 patients with cavernous transformation of the portal vein. Twenty-one of these patients had cirrhosis (Group I), and 20 patients had other causes of portal vein thrombosis (PVT) (Group II). MR studies were performed between September 2006-February 2010 using 1-T MRI system. MR images were reviewed by two radiologists, for the presence of intrapancreatic collaterals and the extension of the PVT.Results: Intrapancreatic collaterals were present in 25 of 41 (61%) patients (11 patients in Group I, 14 patients in Group II). Statistically there was no significant difference between the two groups (p>0.05). Mass effect caused by the intrapancreatic collaterals was not detected in any of our patients. The PVT was extending to the superior mesenteric vein and/or splenic vein in 22 of the 25 patients (88%) with intrapancretic collaterals.Conclusion: Intrapancreatic collaterals are common in patients with cavernous transformation of the portal vein. Cirrhosis does not seem to affect the frequency of intrapancreatic collaterals. The extension of PVT plays the major role in the formation of intrapancreatic collaterals.

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“…Second, we could not perform CTAP in all patients. Also, helical CT is not the best image acquisition technique for the identification of veins [20,21]. Images were obtained with 7 mm/s cephalocaudal table movement and 5-mm collimation.…”

Section: Discussionmentioning

confidence: 99%

Portal flow into the liver through veins at the site of biliary-enteric anastomosis

et al. 2005

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The aim of this study was to establish the role played by jejunal veins in hepatopetal flow after biliary-enteric anastomosis and to evaluate the helical CT features of hepatopetal flow through the anastomosis. We retrospectively analyzed helical CT images of the liver in 31 patients with biliary-enteric anastomosis who underwent hepatic angiography with (n=13) or without (n=18) CT arterial portography within 2 weeks of the CT examination during the last 4 years. Arterial portography showed hepatopetal flow through small vessels located (communicating veins) between the elevated jejunal veins and the intrahepatic portal branches in two (9%) of 22 patients with a normal portal system. Helical CT showed focal parenchymal enhancement around the anastomosis in these two patients. All nine patients with extrahepatic portal vein occlusion (100%) had hepatopetal flow through the anastomosis, and four of the nine had decreased portal flow. CT revealed small communicating veins in two of these four patients. In five patients with normal portal perfusion despite extrahepatic portal vein occlusion, CT detected dilated communicating veins and elevated jejunal veins. The presence of communicating veins and/or focal parenchymal enhancement around the anastomosis indicates hepatopetal flow through the elevated jejunal veins.

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CT Assessment of the Inferior Peripancreatic Veins

Abstract: Dilatation of peripancreatic veins with nonvisualization of inferior peripancreatic veins suggests tumor invasion of peripancreatic tissue.

Cited by 57 publications

References 18 publications

CT and MR imaging patterns for pancreatic carcinoma invading the extrapancreatic neural plexus (Part II): Imaging of pancreatic carcinoma nerve invasion

CT and MR imaging patterns for pancreatic carcinoma invading the extrapancreatic neural plexus (Part II): Imaging of pancreatic carcinoma nerve invasion

Magnetic Resonans Imaging Of Intrapancreatic Collaterals in Portal Vein Thrombosis With And Without Cirrhosis

Portal flow into the liver through veins at the site of biliary-enteric anastomosis

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