Contrast-enhanced MR angiography in patients after kidney transplantation

Huber, Armin; Heuck, A.; Scheidler, Jürgen; Holzknecht, N.; Baur, Alexander; Stangl, Manfred; Theodorakis, J.; Illner, Wolf–Dieter; Land, W.; Reiser, Maximilian

doi:10.1007/s003300100992

Cited by 32 publications

(15 citation statements)

References 22 publications

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“…The sensitivity, specificity, overall accuracy and positive predictive values for 3D-Gd enhanced FSPGR MRA and 3D-PC MRA, performed for 30 patients, for the detection of graft arteries stenosis were: These data are comparable to those reported by Liu X et al (8) concerning the sensitivity and specificity for 3D-TOF and 3D-PC MRA in evaluation of post renal transplant artery stenosis which were: However our data are incomparable to those reported by Huber et al (10) which were: The sensitivity, specificity an overall accuracy of MIP and MPR images were 66.6%, 100%, 98.6% and 100% for detection of graft arteries thrombosis while they were 100%, 96.8%, 97.2%, 100%, 98.4% and 98.6% for detection of graft arteries stenosis.…”

Section: Discussioncontrasting

confidence: 34%

Post Renal Transplant Surgical Complications; MRI Standard Applications and Diagnostic Outcomes

Ella¹

2017

IJMI

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Abstract:Objective: Fast MR imaging sequences together with paramagnetic contrast agents, offer multiple advantages in the assessment of renal function. It provides cross sectional and vascular information without the risk of ionizing radiation, iodinated contrast or arterial catheterization. Post transplantation complications can be grouped as surgical or medical. Immediate surgical complications include renal artery thrombosis or stenosis, urinary leak or lymphocele. Renal allograft frequently require repeated imaging studies during the immediate post-operative period and various times thereafter, when renal function is compromised. Background: End stage renal disease is common and can result from a variety of diseases. Kidney transplantation from living-related donors offered the best prognosis. Imaging modalities that are currently used to evaluate transplanted kidneys are ultrasound (US), computed tomography (CT), scintigraphy, intravenous urography (IVU), contrast angiography, and magnetic resonance imaging (MRI). Methods: This study was conducted on 181 renal transplant recipients. Recipients were 139 males and 42 females. Their age ranged from 20 to 58 years (mean age 39 years). The patients underwent clinical assessment, Laboratory investigations, and different Radiological imaging procedures as: I-Gray scale and color Doppler ultrasonography. II-Magnetic Resonance Imaging. 3D Gd-enhanced MRA. MR Urography. Selective IA-DSA of the graft artery. III-Percutaneous catheter nephrostomy (PCN) and antegrade pyelography. IV-Radio-isotope diuretic renogram using 99m Tc-MAG3. Results: 30 renal transplants were examined by MRI in the 1st 2 weeks after renal transplantation. At the end of 1st 2 weeks, MR examinations were carried out, as basal studies (including MRI, MRA and MRU) for 98 transplants. From this group, 64 transplants were subjected to other MR examinations. After the 1st 2 weeks, 53 transplants were subjected to MR examinations for the 1st time at variable post-transplant duration. Among the studied 181 renal transplants, MR examinations detected 3 cases with graft arteries thrombosis (1.6%), 10 with graft arteries stenosis (5.5%), 6 with segmental infarctions (3.3%), 3 cases with graft intrarenal arteries pseudo-aneurysms (1.6%) and 2 cases with arterio-venous fistulae (1.1%) after graft biopsies. Conclusion: MRI is highly recommended to evaluate intra-/extra-renal graft vascular lesions, urinary obstructive syndrome, compressive collections (urinoma, lymphocele), inflammatory and tumoral lesions of the renal graft.

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Section: Discussioncontrasting

confidence: 34%

Post Renal Transplant Surgical Complications; MRI Standard Applications and Diagnostic Outcomes

Ella¹

2017

IJMI

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“…The utility of MRI has been demonstrated in the renal transplant population (11,12,17). The ability to show soft tissue structure and complications related to surgery and to evaluate vascular abnormalities related to the transplanted kidney has been described (9,10).…”

Section: Introductionmentioning

confidence: 99%

Kidney transplantation: Structural and functional evaluation using MR Nephro‐Urography

Kalb

Martín

Salman

et al. 2008

Magnetic Resonance Imaging

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End-stage-renal disease (ESRD) is a major health issue in the United States, and the Medicare costs of ESRD totaled nearly $21 billion in 2005. Renal transplantation has emerged as the treatment of choice in this patient population, providing improved quality of life and lower healthcare costs compared with other treatment options. Imaging evaluation of a graft kidney plays a critical role in the postoperative care of the renal transplant patient. In the past, diagnostic evaluation of the transplant kidney has depended upon a combination of ultrasonography, computed tomography, MRI, and biopsy, used in conjunction with the patient's clinical presentation. However, new and developing advances in MR technology has lead to the development of MR Nephro-Urography (MRNU), which provides both anatomic and functional evaluation of the kidney in a single examination. It is expected that the increasing use of MRNU will have a significant impact on the management of renal transplant patients. This review describes MRNU methodology, examines known posttransplant complications, and highlights the utility of MRNU as a comprehensive imaging examination to diagnose both surgical and medical complications of the transplant kidney.

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“…Diagnóstico: a confirmação pode ser feita com ecodoppler, cintigrafia renal com radioisótopos (99Tc-DTPA), angioressonância com gadolíneo ou com arteriografia renal clássica. Há também grande aumento da DHL sérica (acima de 1.500 U) [5][6][7] (B). Diagnóstico diferencial: rejeição humoral.…”

Section: Complicações Cirúrgicas Pós-transplante Complicações Vascularesunclassified

Transplante renal: complicações cirúrgicas

2007

Rev. Assoc. Med. Bras.

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Contrast-enhanced MR angiography in patients after kidney transplantation

Cited by 32 publications

References 22 publications

Post Renal Transplant Surgical Complications; MRI Standard Applications and Diagnostic Outcomes

Post Renal Transplant Surgical Complications; MRI Standard Applications and Diagnostic Outcomes

Kidney transplantation: Structural and functional evaluation using MR Nephro‐Urography

Transplante renal: complicações cirúrgicas

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