Zusammenfassung
Ziel: Analyse von portoportalen Kollateralen und von sekundären Veränderungen der Gallenwege
bei Patienten mit kavernöser Pfortadertransformation mit MRT. Material und Methode: Auswertung von 34 Patienten mit angiographisch bzw. MR-angiographisch nachgewiesener
kavernöser Transformation. Beurteilt wurden das Verteilungsmuster der portoportalen
Kollateralen sowie Wandverdickungen, Stenosen, Erweiterungen und Wandunregelmäßigkeiten
der extra- und intrahepatischen Gallenwege. Ergebnisse: Von 34 Patienten mit kavernöser Transformation konnten bei 23 (67,6 %) paracholedochale
portoportale Kollateralen nachgewiesen werden, 22 (64,7 %) hiervon mit abgrenzbaren
Gefäßlumina. Epicholedochale Kollateralen waren bei insgesamt 8 (23,5 %) Patienten
vorhanden. 24 von 34 (70,5 %) Patienten zeigten durch portoportale Kollateralen verursachte
sekundäre Gallengangsveränderungen, bei 8 (23,5 %) Patienten führten sie zu Stenosen
mit Erweiterung der vorgeschalteten Gallenwege. Wandunregelmäßigkeiten wurden bei
weiteren 7 (20,5 %), Wandverdickungen der Gallenwege bei 11 (32,3 %) und der Gallenblase
bei 4 (12,9 %) Patienten registriert. Schlussfolgerungen: Mittels MRT können bei Patienten mit kavernöser Transformation portoportale Kollateralen
identifiziert werden, die häufig zu sekundären Gallengangsveränderungen führen und
differenzialdiagnostisch berücksichtigt werden müssen.
Abstract
Purpose: Evaluation of portoportal collateral vessels and associated biliary abnormalities
in patients with cavernous transformation of the portal vein by MRI. Material and Methods: Review of 34 MRI examinations performed on patients with angiographically or MR-angiographically
proven cavernous transformation. The analysis included the pattern of the portoportal
collateral circulation and the abnormalities of the biliary system, such as wall thickening,
stenosis, dilations and irregularities of the extra-and intrahepatic bile ducts. Results: 23 (67.6%) of 34 patients with cavernous transformation had paracholedochal portoportal
collateral vessels, with 22 (64.7%) showing visible luminal channels. Epicholedochal
venous collaterals could be observed in 8 (23.5%) patients. 24 (70.5%) of 34 patients
demonstrated biliary abnormalities due to portoportal collaterals, leading to stenosis
with dilatation of the proximal bile ducts in 8 (23.5%) patients. The ductal walls
were irregular in 7 (20.5%) patients, and thickened in 11 (32.3%). The gallbladder
wall was thickened in 4 (12.9%) patients. Conclusion: Portoportal collaterals in patients with cavernous transformation of the portal vein
can be identified by MRI. These collaterals frequently alter the biliary system, which
must be considered in differential diagnosis of biliary abnormalities observed in
the presence of portoportal collaterals.
Schlüsselwörter
Kavernöse Pfortadertransformation - portoportale Kollateralen - sekundäre Gallengangsveränderungen
- MRT
Key words
Portal cavernous transformation - portoportal collaterals - MRI - biliary abnormalities
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Dr. Rolf Schaible
Radiologische Klinik, Universität Bonn
Sigmund-Freud-Str. 25
53127 Bonn
Telefon: 0228/2875870
Fax: 0228/2876093
eMail: rolfschaible@t-online.de