Acquired portosystemic collaterals: anatomy and imaging
| Autor: | Jorge Elias Júnior, Sara Reis Teixeira, Andréa Farias de Melo Leite, Américo Mota Jr., Valdair Francisco Muglia, Francisco Abaeté Chagas-Neto |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
lcsh:Medical physics. Medical radiology. Nuclear medicine
medicine.medical_specialty Collateral circulation Hypertension portal/complications lcsh:R895-920 Portal venous pressure Portosystemic collaterals Systemic circulation 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Splanchnic circulation medicine Radiology Nuclear Medicine and imaging Splanchnic Circulation business.industry Blood flow medicine.disease Pictorial Essays RADIOLOGIA 030220 oncology & carcinogenesis Portal hypertension Radiology business Shunt (electrical) |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Radiologia Brasileira v.49 n.4 2016 Radiologia Brasileira Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR) instacron:CBR Radiologia Brasileira, Vol 49, Iss 4, Pp 251-256 |
| ISSN: | 0100-3984 |
| DOI: | 10.1590/0100-3984.2015.0026 |
| Popis: | Portosystemic shunts are enlarged vessels that form collateral pathological pathways between the splanchnic circulation and the systemic circulation. Although their causes are multifactorial, portosystemic shunts all have one mechanism in common-increased portal venous pressure, which diverts the blood flow from the gastrointestinal tract to the systemic circulation. Congenital and acquired collateral pathways have both been described in the literature. The aim of this pictorial essay was to discuss the distinct anatomic and imaging features of portosystemic shunts, as well as to provide a robust method of differentiating between acquired portosystemic shunts and similar pathologies, through the use of illustrations and schematic drawings. Imaging of portosystemic shunts provides subclinical markers of increased portal venous pressure. Therefore, radiologists play a crucial role in the identification of portosystemic shunts. Early detection of portosystemic shunts can allow ample time to perform endovascular shunt operations, which can relieve portal hypertension and prevent acute or chronic complications in at-risk patient populations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|