Functional evaluation of secondary renal amyloidosis with diffusion-weighted MR imaging

被引:4
|
作者
Rona, Gunay [1 ]
Pasaoglu, Lale [1 ]
Ozkayar, Nihal [1 ]
Ciliz, Deniz [1 ]
Toprak, Ugur [1 ]
Kaya, Tunca [1 ]
Abat, Gizem [1 ]
机构
[1] Ankara Numune Egitim & Arastirma Hastanesi, Ankara, Turkey
关键词
Secondary amyloidosis; diffusion-weighted imaging; kidney; magnetic resonance imaging; chronic kidney disease; AA AMYLOIDOSIS; LESIONS CHARACTERIZATION; KIDNEY; COEFFICIENT; EXPERIENCE; DISEASE;
D O I
10.3109/0886022X.2015.1128252
中图分类号
R5 [内科学]; R69 [泌尿科学(泌尿生殖系疾病)];
学科分类号
1002 ; 100201 ;
摘要
Objectives This study evaluated whether diffusion-weighted magnetic resonance imaging (DW-MRI) can be used to diagnose secondary renal amyloidosis looking specifically at the diagnostic efficacy of two apparent diffusion coefficient (ADC) measurement methods as they were used with DW-MRI. Methods The study included 24 amyloid nephropathy (AN) patients, 20 chronic kidney disease (CKD) patients, and 20 healthy volunteers (HV). ADC values were measured using two different methods: 1) the method of the region of interest indicators (ROIs) and 2) the method of drawing whole renal parenchyma (WP). The correlation between the two methods was evaluated. Results ROIs could differentiate AN-CKD (p = 0.007). ROIs and WP could differentiate AN-HV (p<0.05). However, none of the methods could differentiate CKD-HV (p>0.05). The sensitivity and specificity of the ROIs method in differentiating AN from CKD patients for 1.8 x 10(-3) cutoff ADC values were 79% and 60% and for AN-HV patients 79% and 70%. ADC values of AN patients with GFR>60 mL/min were lower than that of HV (p<0.01). Conclusion DW-MRI is a useful and non-invasive diagnostic tool in diagnosing secondary renal amyloidosis and differentiating renal amyloidosis from other CKDs. ROIs had the highest sensitivity and specificity for assessing the involvement of renal amyloidosis. MRI diagnosis of AN may obviate a renal biopsy for diagnosis.
引用
收藏
页码:249 / 255
页数:7
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