Diffusion weighted imaging in the detection of upper urinary tract urothelial tumors
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | International Braz J Urol (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382010000100004 |
Resumo: | PURPOSE: Diffusion-weighted (DW) magnetic resonance imaging (MRI) provides information about the biophysical properties of tissues such as cell organization and density. DW imaging (DWI) is becoming important in the assessment of malignant tumors. The purpose of our study was to evaluate the capability and reliability of DWI in the evaluation of upper urinary tract urothelial tumors. MATERIALS AND METHODS: DWI was performed in seventeen patients with upper urinary tract urothelial tumor, previously diagnosed by either CT or retrograde pyelography. An histological evaluation was performed after surgical resection. Each MRI was carried out using a 1.5T superconductive magnet MRI system. DWI images were obtained with b value of 1000 s/mm2 under normal breathing. The apparent diffusion coefficient (ADC) values were measured. RESULTS: In nine patients with renal pelvis tumors and seven patients with ureteral tumors, the lesions were shown as high-signal intensity in the corresponding region on DWI. In one patient with carcinoma in situ (CIS) of the ureter, the lesion was not depicted with DWI. The mean ADC value of the tumor was 1.125 ± 0.217 x 10-3 mm2/s and was significantly lower than those of the renal parenchyma (1.984 ± 0.238 x 10-3 mm2/s, p < 0.01) and the urine (2.941 ± 0.315 x 10-3 mm2/s, p < 0.01). CONCLUSIONS: In our study, the renal pelvic and ureteral tumors except CIS were shown clearly with DWI. Although further studies are required, DWI may take the place of invasive retrograde urography for detecting tumors of the upper urinary tract. |
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Diffusion weighted imaging in the detection of upper urinary tract urothelial tumorsmagnetic resonance imagingtransitional cellneoplasmrenal pelvisureterPURPOSE: Diffusion-weighted (DW) magnetic resonance imaging (MRI) provides information about the biophysical properties of tissues such as cell organization and density. DW imaging (DWI) is becoming important in the assessment of malignant tumors. The purpose of our study was to evaluate the capability and reliability of DWI in the evaluation of upper urinary tract urothelial tumors. MATERIALS AND METHODS: DWI was performed in seventeen patients with upper urinary tract urothelial tumor, previously diagnosed by either CT or retrograde pyelography. An histological evaluation was performed after surgical resection. Each MRI was carried out using a 1.5T superconductive magnet MRI system. DWI images were obtained with b value of 1000 s/mm2 under normal breathing. The apparent diffusion coefficient (ADC) values were measured. RESULTS: In nine patients with renal pelvis tumors and seven patients with ureteral tumors, the lesions were shown as high-signal intensity in the corresponding region on DWI. In one patient with carcinoma in situ (CIS) of the ureter, the lesion was not depicted with DWI. The mean ADC value of the tumor was 1.125 ± 0.217 x 10-3 mm2/s and was significantly lower than those of the renal parenchyma (1.984 ± 0.238 x 10-3 mm2/s, p < 0.01) and the urine (2.941 ± 0.315 x 10-3 mm2/s, p < 0.01). CONCLUSIONS: In our study, the renal pelvic and ureteral tumors except CIS were shown clearly with DWI. Although further studies are required, DWI may take the place of invasive retrograde urography for detecting tumors of the upper urinary tract.Sociedade Brasileira de Urologia2010-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382010000100004International braz j urol v.36 n.1 2010reponame:International Braz J Urol (Online)instname:Sociedade Brasileira de Urologia (SBU)instacron:SBU10.1590/S1677-55382010000100004info:eu-repo/semantics/openAccessNishizawa,ShujiImai,ShunOkaneya,ToshikazuNakayama,TsuyoshiKamigaito,TakayukiMinagawa,Tomonorieng2010-04-20T00:00:00Zoai:scielo:S1677-55382010000100004Revistahttp://www.brazjurol.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||brazjurol@brazjurol.com.br1677-61191677-5538opendoar:2010-04-20T00:00International Braz J Urol (Online) - Sociedade Brasileira de Urologia (SBU)false |
dc.title.none.fl_str_mv |
Diffusion weighted imaging in the detection of upper urinary tract urothelial tumors |
title |
Diffusion weighted imaging in the detection of upper urinary tract urothelial tumors |
spellingShingle |
Diffusion weighted imaging in the detection of upper urinary tract urothelial tumors Nishizawa,Shuji magnetic resonance imaging transitional cell neoplasm renal pelvis ureter |
title_short |
Diffusion weighted imaging in the detection of upper urinary tract urothelial tumors |
title_full |
Diffusion weighted imaging in the detection of upper urinary tract urothelial tumors |
title_fullStr |
Diffusion weighted imaging in the detection of upper urinary tract urothelial tumors |
title_full_unstemmed |
Diffusion weighted imaging in the detection of upper urinary tract urothelial tumors |
title_sort |
Diffusion weighted imaging in the detection of upper urinary tract urothelial tumors |
author |
Nishizawa,Shuji |
author_facet |
Nishizawa,Shuji Imai,Shun Okaneya,Toshikazu Nakayama,Tsuyoshi Kamigaito,Takayuki Minagawa,Tomonori |
author_role |
author |
author2 |
Imai,Shun Okaneya,Toshikazu Nakayama,Tsuyoshi Kamigaito,Takayuki Minagawa,Tomonori |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Nishizawa,Shuji Imai,Shun Okaneya,Toshikazu Nakayama,Tsuyoshi Kamigaito,Takayuki Minagawa,Tomonori |
dc.subject.por.fl_str_mv |
magnetic resonance imaging transitional cell neoplasm renal pelvis ureter |
topic |
magnetic resonance imaging transitional cell neoplasm renal pelvis ureter |
description |
PURPOSE: Diffusion-weighted (DW) magnetic resonance imaging (MRI) provides information about the biophysical properties of tissues such as cell organization and density. DW imaging (DWI) is becoming important in the assessment of malignant tumors. The purpose of our study was to evaluate the capability and reliability of DWI in the evaluation of upper urinary tract urothelial tumors. MATERIALS AND METHODS: DWI was performed in seventeen patients with upper urinary tract urothelial tumor, previously diagnosed by either CT or retrograde pyelography. An histological evaluation was performed after surgical resection. Each MRI was carried out using a 1.5T superconductive magnet MRI system. DWI images were obtained with b value of 1000 s/mm2 under normal breathing. The apparent diffusion coefficient (ADC) values were measured. RESULTS: In nine patients with renal pelvis tumors and seven patients with ureteral tumors, the lesions were shown as high-signal intensity in the corresponding region on DWI. In one patient with carcinoma in situ (CIS) of the ureter, the lesion was not depicted with DWI. The mean ADC value of the tumor was 1.125 ± 0.217 x 10-3 mm2/s and was significantly lower than those of the renal parenchyma (1.984 ± 0.238 x 10-3 mm2/s, p < 0.01) and the urine (2.941 ± 0.315 x 10-3 mm2/s, p < 0.01). CONCLUSIONS: In our study, the renal pelvic and ureteral tumors except CIS were shown clearly with DWI. Although further studies are required, DWI may take the place of invasive retrograde urography for detecting tumors of the upper urinary tract. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382010000100004 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382010000100004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1677-55382010000100004 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Urologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Urologia |
dc.source.none.fl_str_mv |
International braz j urol v.36 n.1 2010 reponame:International Braz J Urol (Online) instname:Sociedade Brasileira de Urologia (SBU) instacron:SBU |
instname_str |
Sociedade Brasileira de Urologia (SBU) |
instacron_str |
SBU |
institution |
SBU |
reponame_str |
International Braz J Urol (Online) |
collection |
International Braz J Urol (Online) |
repository.name.fl_str_mv |
International Braz J Urol (Online) - Sociedade Brasileira de Urologia (SBU) |
repository.mail.fl_str_mv |
||brazjurol@brazjurol.com.br |
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1750318071585701888 |