Contrast-enhanced ultrasonography in the diagnosis of upper urinary tract urothelial cell carcinoma: a preliminary study.
Ultraschall Med
; 34(1): 30-7, 2013 Feb.
Article
em En
| MEDLINE
| ID: mdl-23165789
ABSTRACT
PURPOSE:
The main objective was to assess the effectiveness of contrast-enhanced ultrasonography (CEUS) in the diagnosis of upper urinary tract malignancies by comparing with multidetector computed tomographic urography (MDCTU) and magnetic resonance urography (MRU). Secondary objectives were to compare the tumor size measured with CEUS, MDCTU and MRU and to assess the usefulness of CEUS in distinguishing high-grade tumors from low-grade ones. MATERIALS ANDMETHODS:
In connection with this prospective study carried out from January 2009 to September 2011, 18 patients underwent MDCTU or MRU, grayscale ultrasonography (US), color Doppler ultrasonography and CEUS followed by surgery and histological examination of the specimen. Quantitative analysis was performed using perfusion software. Time intensity curves were extracted and the following parameters were considered wash-in time, time-to-peak, maximum signal intensity and wash-out time.RESULTS:
Grayscale US identified 15/18 lesions; color Doppler showed no flow signal in 8 lesions, low color signal in 9 lesions and an intense color signal in 1 lesion; CEUS identified 17/18 lesions with the undetected lesion being the smallest one (1.2 cm) located in the upper pelvicalyceal system. Semi-quantitative analysis produced different data for high-grade and low-grade urothelial cell carcinoma (UCC). All detected upper urinary tract masses were UCCs. MRU, MDCTU and grayscale US overestimated the tumor size, while CEUS was the most accurate.CONCLUSION:
CEUS is useful for evaluating upper urinary tract masses as this method permits differentiation between high-grade and low-grade tumors as well as distinction of the tumor from the adjacent structures and accurate mass measurements.
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Base de dados:
MEDLINE
Assunto principal:
Neoplasias Ureterais
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Interpretação de Imagem Assistida por Computador
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Aumento da Imagem
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Carcinoma de Células de Transição
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Ultrassonografia Doppler em Cores
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Meios de Contraste
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Neoplasias Renais
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article