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Imaging-based procedures have become well integrated into the diagnosis and management of oncological patients and play a significant role in reducing morbidity and mortality rates. Here we describe the established and upcoming surgical oncological imaging techniques and their impact on cancer management.
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Various image-guided ablative procedures include chemical and thermal ablation techniques and irreversible electroporation. These have been used for curative intent for small tumours and palliative intent for debulking, immunogenicity and pain control. Understanding these techniques is critical to avoiding complications and achieving superior clinical outcomes. Additionally, combination with immunotherapy and chemotherapies is rapidly evolving. There are numerous opportunities in interventional radiology to advance ablation techniques and seamlessly integrate into current treatment regimens for both benign and malignant tumours.
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The portal vein is formed at the confluence of the splenic and superior mesenteric vein behind the head of the pancreas. Normal blood pressure within the portal system varies between 5 and 10 mmHg. Portal hypertension is defined when the gradient between the portal and systemic venous blood pressure exceeds 5 mmHg. The most common cause of portal hypertension is cirrhosis. In cirrhosis, portal hypertension develops due to extensive fibrosis within the liver parenchyma causing increased vascular resistance. In addition, the inability of the liver to metabolise certain vasodilators leads to hyperdynamic splanchnic circulation resulting in increased portal blood flow. Decompression of the portal pressure is achieved by formation of portosystemic collaterals. In this review, we will discuss the pathophysiology, anatomy, and imaging findings of spontaneous portosystemic collaterals and clinical manifestations of portal hypertension with emphasis on the role of interventional radiology in the management of complications related to portal hypertension.
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Circulação Colateral , Procedimentos Endovasculares/métodos , Hipertensão Portal/diagnóstico por imagem , Hipertensão Portal/cirurgia , Humanos , Hipertensão Portal/diagnóstico , Veia Porta/diagnóstico por imagem , Tomografia Computadorizada por Raios X , UltrassonografiaRESUMO
Extrinsic venous compression is caused by compression of the veins in tight anatomic spaces by adjacent structures, and is seen in a number of locations. Venous compression syndromes, including Paget-Schroetter syndrome, Nutcracker syndrome, May-Thurner syndrome and popliteal venous compression will be discussed. These syndromes are usually seen in young, otherwise healthy individuals, and can lead to significant overall morbidity. Aside from clinical findings and physical examination, diagnosis can be made with ultrasound, CT, or MR conventional venography. Symptoms and haemodynamic significance of the compression determine the ideal treatment method.
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Diagnóstico por Imagem , Doenças Vasculares/diagnóstico , Doenças Vasculares/terapia , Constrição Patológica/diagnóstico , Constrição Patológica/terapia , Humanos , Síndrome de May-Thurner/diagnóstico , Síndrome de May-Thurner/terapia , Veia Poplítea , Síndrome do Quebra-Nozes/diagnóstico , Síndrome do Quebra-Nozes/terapia , Trombose Venosa Profunda de Membros Superiores/diagnóstico , Trombose Venosa Profunda de Membros Superiores/terapiaRESUMO
OBJECTIVE: In this study we aimed to assess the image quality and degree of vascular enhancement using low-concentration contrast media (LCCM) (300 mg I ml(-1)) and high-concentration contrast media (HCCM) (370 mg I ml(-1)) on 64-slice multidetector row CT (MDCT) abdominal CT angiography (CTA). In addition, we aimed to study the feasibility of using HCCM with a reduced total iodine dose. METHODS: CTA of the abdomen on a 64-slice MDCT was performed on 15 anaesthetised pigs. Study pigs were divided into three groups of five each based on the iodine concentration and dose received: Group A (LCCM; 300 mg I ml(-1)), Group B (HCCM; 370 mg I ml(-1)) and Group C HCCM with 20% less iodine dose. The total iodine injected was kept constant (600 mg kg(-1)) in Groups A and B. Qualitative and quantitative analyses were performed to study and compare each group for image quality, visibility of the branch order of the superior mesenteric artery (SMA), artefacts, degree of enhancement in the aorta and main stem arteries and uniformity of enhancement in the aorta. Groups were compared using the analysis of variance test. RESULTS: The image quality of 64-slice MDCT angiography was excellent with a mean score of 4.63 and confident visualisation of the third to fifth order branches of the SMA in all groups. Group B demonstrated superior vascular enhancement, as compared with Groups A and C (p≤0.05). Uniform aortic enhancement was achieved with the use of LCCM and HCCM with 20% less iodine dose. CONCLUSION: 64-slice MDCT angiography of the abdomen was of excellent quality. HCCM improves contrast enhancement and overall CTA image quality and allows the iodine dose to be reduced.
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Aorta Abdominal/diagnóstico por imagem , Meios de Contraste/administração & dosagem , Iodo/administração & dosagem , Artéria Mesentérica Superior/diagnóstico por imagem , Interpretação de Imagem Radiográfica Assistida por Computador/métodos , Tomografia Computadorizada por Raios X/métodos , Análise de Variância , Angiografia/métodos , Animais , Relação Dose-Resposta a Droga , Feminino , Masculino , Estudos Prospectivos , SuínosRESUMO
PURPOSE: To describe the pathophysiology, identification and management of inferior pancreaticoduodenal artery aneurysms in association with celiac axis stenosis or occlusion has been reported. REVIEW FINDINGS: These aneurysms are thought to arise due to increased flow through the pancreaticoduodenal arcades. The arcades first enlarge, and then form focal aneurysms which may rupture. The aneurysms can be treated through endovascular techniques or by surgery, though the former is a preferred approach.
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Aneurisma/etiologia , Arteriopatias Oclusivas/complicações , Artéria Celíaca , Duodeno/irrigação sanguínea , Pâncreas/irrigação sanguínea , Procedimentos Cirúrgicos Vasculares/métodos , Aneurisma/diagnóstico por imagem , Aneurisma/cirurgia , Angiografia , Arteriopatias Oclusivas/diagnóstico por imagem , Arteriopatias Oclusivas/cirurgia , Humanos , Tomografia Computadorizada por Raios XRESUMO
Gartner's duct cyst associated with ipsilateral renal aplasia is a rare anomaly and fewer than 40 cases have been reported in the literature. A case of Gartner's duct cyst presenting like an ureterocele on sonography, intravenous pyelography and CT are described.
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Cistos/diagnóstico , Rim/anormalidades , Ureterocele/diagnóstico , Ductos Mesonéfricos , Pré-Escolar , Meios de Contraste , Cistos/complicações , Diagnóstico Diferencial , Feminino , Humanos , Tomografia Computadorizada por Raios X , Ureterocele/complicações , UrografiaRESUMO
Myotonic dystrophy is a rare genetic neuromuscular disorder with multisystem involvement. Hydrocephalus and cognitive deterioration are not commonly considered part of adult-onset myotonic dystrophy. This report describes a case of progressive distal muscle weakness, cognitive decline, and longstanding ventricular enlargement. Review of the literature suggests that hydrocephalus may be associated with myotonic dystrophy while progressive cognitive decline is rare in the adult form of the disease.