Validation of Multiparametric MRI by Histopathology After Nephrectomy: a Case Study

Overview

Journal MAGMA

Publisher Springer

Date 2020 Sep 21

PMID 32954447

Citations 1

Authors

Anneloes de Boer

Tobias T Pieters

Anita A Harteveld

Peter J Blankestijn

Clemens Bos

Martijn Froeling

Roel Goldschmeding

Hans J M Hoogduin

Jaap A Joles

Bart-Jeroen Petri

Marianne C Verhaar

Tim Leiner

Tri Q Nguyen

Arjan D van Zuilen

Affiliations

Soon will be listed here.

Abstract

Objectives: Renal multiparametric MRI (mpMRI) is a promising tool to monitor renal allograft health to enable timely treatment of chronic allograft nephropathy. This study aims to validate mpMRI by whole-kidney histology following transplantectomy.

Materials And Methods: A patient with kidney transplant failure underwent mpMRI prior to transplantectomy. The mpMRI included blood oxygenation level-dependent (BOLD) MRI, T and T mapping, diffusion-weighted imaging (DWI), 2D phase contrast (2DPC) and arterial spin labeling (ASL). Parenchymal mpMRI measures were compared to normative values obtained in 19 healthy controls. Differences were expressed in standard deviations (SD) of normative values. The mpMRI measures were compared qualitatively to histology.

Results: The mpMRI showed a heterogeneous parenchyma consistent with extensive interstitial hemorrhage on histology. A global increase in T (+ 3.0 SD) and restricted diffusivity (- 3.6 SD) were consistent with inflammation and fibrosis. Decreased T (- 1.8 SD) indicated fibrosis or hemorrhage. ASL showed diminished cortical perfusion (- 2.9 SD) with patent proximal arteries. 2DPC revealed a 69% decrease in renal perfusion. Histological evaluation showed a dense inflammatory infiltrate and fibrotic changes, consistent with mpMRI results. Most interlobular arteries were obliterated while proximal arteries were patent, consistent with ASL findings.

Discussion: mpMRI findings correlated well with histology both globally as well as locally.

Citing Articles

Contemporary and Emerging MRI Strategies for Assessing Kidney Allograft Complications: Arterial Stenosis and Parenchymal Injury, From the Special Series on Imaging of Fibrosis.

Bane O, Lewis S, Lim R, Carney B, Shah A, Fananapazir G AJR Am J Roentgenol. 2023; 222(3):e2329418.

PMID: 37315018 PMC: 11006565. DOI: 10.2214/AJR.23.29418.

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