The role of diffusion-weighted MRI and contrast-enhanced MRI for differentiation between solid renal masses and renal cell carcinoma subtypes

Purpose To assess the value of diffusion-weighted magnetic resonance imaging (DW-MRI) and contrast-enhanced MRI (CE-MRI) for differentiation between benign and malignant solid renal masses, renal cell carcinoma (RCC) subtypes, oncocytomas, and lipid-poor angiomyolipomas (LP-AML). Methods Minimum or lowest ‘apparent diffusion coefficient’ ($ ADC_{1} $) and representative ADC values ($ ADC_{2} $) of 112 renal masses (n: 46 benign renal mass, n: 66 malignant renal mass) were measured on DW-MRI images (b 50, 400, 800 s/$ mm^{2} $). Signal intensity (SI) measurements were performed in normal renal parenchyma and most avid enhanced area of the renal masses at precontrast, corticomedullary, and nephrographic phases on CE-MRI. Contrast enhancement rate (CER) and contrast enhancement index (CEI) values of renal masses were compared between benign-malignant renal masses and RCC subtypes, oncocytomas, and LP-AMLs. Results There was no significant difference between $ ADC_{1} $, $ ADC_{2} $ values, and SI of benign and malignant renal masses (p = 0.721, p = 0.255, p = 0.872). Mean $ ADC_{1} $ and $ ADC_{2} $ values of clear cell RCCs were significantly higher than nonclear cell RCCs (p = 0.005 p = 0.002). Mean CER value of clear cell RCCs was significantly higher than nonclear cell RCCs in nephrographic phase (p = 0.003). Mean CEI values of clear cell RCCs were significantly higher than nonclear cell RCCs in the corticomedullary and nephrographic phase (p = 0.027 vs. 0.008). LP-AMLs were differentiated from other renal masses with wash-out phenomenon. Conclusion Combined usage of ADC, SI, CER, and CEI values may be useful for discrimination between RCC subtypes, oncocytomas, and lipid-poor AMLs..

Medienart:

Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:46

Enthalten in:

Abdominal radiology - 46(2020), 3 vom: 15. Sept., Seite 1041-1052

Sprache:

Englisch

Beteiligte Personen:

Serter, Aslı [VerfasserIn]
Onur, Mehmet Ruhi [VerfasserIn]
Coban, Ganime [VerfasserIn]
Yildiz, Pelin [VerfasserIn]
Armagan, Abdullah [VerfasserIn]
Kocakoc, Ercan [VerfasserIn]

Links:

Volltext [lizenzpflichtig]

Themen:

Benign neoplasms
Diffusion-weighted MRI
Kidney
Magnetization transfer contrast imaging
Malignant neoplasms

Anmerkungen:

© Springer Science+Business Media, LLC, part of Springer Nature 2020

doi:

10.1007/s00261-020-02742-w

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

OLC2124220101