Low-dose gadobenate dimeglumine-enhanced MRI of the kidney for the differential diagnosis of localized renal lesions.

Abstract

OBJECTIVE:

To evaluate low-dose gadobenate dimeglumine-enhanced MRI for the differential diagnosis of malignant renal tumors.

METHODS:

Sixty-two consecutive patients with unclear diagnosis at MDCT/ultrasound underwent dynamic CE-MRI of the kidneys with 0.05 mmol/kg gadobenate dimeglumine. Retrospective image evaluation was performed by two blinded readers. Lesion diagnosis at CE-MRI was correlated with findings from histology following tumor resection or from imaging follow-up after at least 1 year. Assessments were performed of diagnostic quality and level of diagnostic information.

RESULTS:

Thirty-nine (63 %) patients were correctly diagnosed with malignant lesions (36 with RCC, 2 with renal metastases, 1 with lymphoma) while 14 (22.6 %) patients were correctly diagnosed with benign (n = 12) or no (n = 2) lesions. Eight patients were considered false positive (5 with oncocytoma, 3 with atypical AML) and 1 patient false negative (atypical RCC). The sensitivity, specificity, accuracy, PPV, and NPV for the diagnosis of malignant renal lesions were 97.5 % (39/40), 63.6 % (14/22), 85.5 % (53/62), 83.0 % (39/47), and 93.3 % (14/15), respectively. Images were excellent in 60 and good in 2 patients. Minimal artifacts that did not compromise diagnosis were noted in 4/62 patients.

CONCLUSION:

Low-dose gadobenate dimeglumine-enhanced MRI is effective for the differential diagnosis of malignant renal tumors.

• Authors: Guenther Schneider, Thorsten Probst, Miles A Kirchin, Jonas Stroeder, Peter Fries, Arno Buecker
• Journal: La Radiologia medica (Radiol Med) Vol. 120 Issue 12 Pg. 1100-11 (Dec 2015) ISSN: 1826-6983 [Electronic] Italy
• PMID: 26088468 (Publication Type: Journal Article)

Chemical References

• Contrast Media
• Organometallic Compounds
• gadobenic acid
• Meglumine

Topics

• Adolescent
• Adult
• Aged
• Artifacts
• Carcinoma, Renal Cell (diagnosis, pathology)
• Child
• Contrast Media (administration & dosage)
• Diagnosis, Differential
• False Negative Reactions
• False Positive Reactions
• Female
• Humans
• Kidney (pathology)
• Kidney Neoplasms (diagnosis, secondary)
• Lymphoma (diagnosis)
• Magnetic Resonance Imaging (methods)
• Male
• Meglumine (administration & dosage, analogs & derivatives)
• Middle Aged
• Organometallic Compounds (administration & dosage)