Dynamic MRI in indirect estimation of microvessel density, histologic grade, and prognosis in colorectal adenocarcinomas

被引:62
作者
Tuncbilek, N [1 ]
Karakas, HM
Altaner, S
机构
[1] Trakya Univ, Sch Med, Dept Radiol, TR-22030 Edirne, Turkey
[2] Inonu Univ, Fac Med, Trugut Ozal Med Ctr, Dept Radiol, Malatya, Turkey
[3] Trakya Univ, Sch Med, Dept Pathol, TR-22030 Edirne, Turkey
来源
ABDOMINAL IMAGING | 2004年 / 29卷 / 02期
关键词
colorectal cancer; dynamic magnetic resonance imaging; contrast enhancement; angiogenesis; microvessel density; prognostic indicators;
D O I
10.1007/s00261-003-0090-2
中图分类号
R57 [消化系及腹部疾病];
学科分类号
摘要
The relations of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) parameters to microvessel density (MVD), histologic grade, and presence of metastasis were evaluated to establish new prognostic indicators in colorectal cancer (CRC). Fast-low angle shot DCE-MRI parameters (time-intensity curves, TICs; maximal relative enhancement within the first minute, E-max/1; maximal relative enhancement of the entire study, E-max; steepest slope of the contrast enhancement curve; and time to peak enhancement) of 21 CRCs (seven Duke stage B, 12 Duke stage C, and two Duke stage D) were retrospectively evaluated and correlated with corresponding postoperative MVD measurements, histologic grades, and presence of metastasis at 2 years. TICs were classified as type A in nine (43%), type B in seven (33%), and type C in five cases (24%). There was a significant difference between TIC types with regard to MVD (p < 0.05-0.001). Time to peak enhancement, steepest slope of TIC, and E-max/1 were strongly correlated with MVD (r = -0.765, p < 0.01; r = 0.681, p < 0.01; r = 0.634, p < 0.01; respectively). MVD, steepest slope of the enhancement curve, E-max/1, and E-max strongly correlated with histologic grade (r = 0.475, p < 0.05; r = 0.683, p < 0.01; r = 0.687, p < 0.01; r = 0.791, p < 0.01; respectively). There was a significant difference between groups of patients with and without metastasis with regard to histologic grade (p < 0.05) and two of the DCE-MRI parameters (p < 0.005 for E-max/1 and p < 0.05 for time to peak enhancement). Discriminant analysis correctly predicted the metastatic occurrence at 2 years in 90.5% of cases using E-max/1 (p < 0.001). Histologic grade resulted in lower rates of discrimination (66.7%; p < 0.05). DCE-MRI parameters may help in the prediction of MVD and histologic grade in CRC and may be used to predict therapeutic outcome.
引用
收藏
页码:166 / 172
页数:7
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