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Use of conventional MR imaging and diffusion-weighted imaging for evaluating the risk grade of gastrointestinal stromal tumors.
Zhou, Hai Ying; Zhang, Xiao Ming; Zeng, Nan Lin; Jian, Shun Hai; Tang, Wei.
Afiliación
  • Zhou HY; Sichuan Key Laboratory of Medical Imaging, Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Sichuan, China.
J Magn Reson Imaging ; 36(6): 1395-401, 2012 Dec.
Article en En | MEDLINE | ID: mdl-22941951
PURPOSE: To study the risk grade of gastrointestinal stromal tumors (GISTs) with conventional MR imaging and diffusion-weighted imaging (DWI). MATERIALS AND METHODS: The abdominal MR images with DWI of 23 patients with pathologically proven GISTs during January 2010 to May 2011 were retrospectively reviewed. The conventional MR imaging findings and apparent diffusion coefficient (ADC) values of the tumors related to the risk grade were analyzed. RESULTS: In the 23 patients, there were 13 patients with high-risk, 5 with medium-risk, 5 with low-risk, and 0 with very low-risk GISTs. Most of the conventional MR findings of the tumors did not correlate with the risk grade. The only exception to this was the correlation between risk grade and the enhancement degree of the tumor after Gd-DTPA. The ADC values were, respectively, (1.04 ± 0.13) × 10(-3) mm(2) ·s(-1) , (1.59 ± 0.06) × 10(-3) mm(2) ·s(-1) and (1.94 ± 0.08) × 10(-3) mm(2) ·s(-1) (P < 0.05) in the high-, medium-, and low-risk grade groups. The ADC values of GISTs decreased with the increase of the risk grade of the tumors (r = -0.957; P < 0.05). CONCLUSION: DWI can be used to assess the risk grade of GISTs, but conventional MR imaging is of limited use.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Imagen de Difusión por Resonancia Magnética / Tumores del Estroma Gastrointestinal / Neoplasias Gastrointestinales Tipo de estudio: Diagnostic_studies / Etiology_studies / Risk_factors_studies Límite: Adult / Aged / Aged80 / Female / Humans / Male / Middle aged Idioma: En Revista: J Magn Reson Imaging Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2012 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Imagen de Difusión por Resonancia Magnética / Tumores del Estroma Gastrointestinal / Neoplasias Gastrointestinales Tipo de estudio: Diagnostic_studies / Etiology_studies / Risk_factors_studies Límite: Adult / Aged / Aged80 / Female / Humans / Male / Middle aged Idioma: En Revista: J Magn Reson Imaging Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2012 Tipo del documento: Article País de afiliación: China
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