Computed tomography and magnetic resonance imaging findings of malignant solid pseudopapillary tumors of the pancreas with macroscopic venous tumor thrombosis: a report of 4 cases.
J Comput Assist Tomogr
; 38(3): 383-90, 2014.
Article
em En
| MEDLINE
| ID: mdl-24651747
ABSTRACT
PURPOSE:
The purpose of this study was to report the imaging findings of malignant pancreatic solid pseudopapillary tumors (SPTs) with macroscopic venous tumor thrombi.METHODS:
The clinical features and imaging findings of 4 cases of malignant pancreatic SPT with venous tumor thrombi were retrospectively reviewed.RESULTS:
The tumor thrombi were located in the splenic vein (n = 3) or the main portal vein and the proximal splenic vein (n = 1). Venous thrombi were connected with the main pancreatic tumors and showed venous filling defects on computed tomography and magnetic resonance imaging. Tumor thrombi primarily consisting of necrotic component and/or hemorrhage displayed no enhancement after contrast injection (n = 3). The enhancement pattern of the tumor thrombi that consisted mainly of tumor nests was consistent with pancreatic SPT (n = 1), that is, a slight enhancement in the arterial phase and a progressive enhancement in the portal venous phase and the equilibrium phase. Venous tumor thrombi associated with hemorrhage were hyperintense on both T1-weighted and T2-weighted images.CONCLUSIONS:
It is uncommon for pancreatic SPTs to spread by invading the venous system and forming macroscopic venous tumor thrombi.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Pancreáticas
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Imageamento por Ressonância Magnética
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Adenocarcinoma Papilar
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Tomografia Computadorizada por Raios X
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Trombose Venosa
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
Limite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article