Evolutionary Magnetic Resonance Appearance of Renal Cell Carcinoma After Percutaneous Cryoablation

Overview

Journal Br J Radiol

Publisher Oxford University Press

Specialty Radiology

Date 2016 Jul 13

PMID 27401340

Citations 8

Authors

Han-Jui Lee

Hsiao-Jen Chung

Hsin-Kai Wang

Shu-Huei Shen

Yen-Hwa Chang

Chun-Ku Chen

Hsiao-Ping Chou

Yi-You Chiou

Affiliations

Soon will be listed here.

Abstract

Objective: To determine the evolutionary MRI appearance of renal cell carcinoma (RCC) following cryoablation.

Methods: For this institution review board-approved study, we recruited patients with biopsy-proven RCC and treated them with percutaneous cryoablation between November 2009 and October 2014. Two radiologists retrospectively reviewed the pre-procedural and follow-up MRI. The findings included tumour sizes, signal intensities on T1 weighted imaging (T1WI), T2 weighted imaging (T2WI), diffusion-weighted imaging, apparent diffusion coefficient (ADC) map and contrast enhancement patterns. The ADC values of the tumours before and after treatment were measured.

Results: A total of 26 patients were enrolled. The ablated tumours exhibited predominantly high signals on T1WI at 1-9-month follow-up (47.1% strong hyperintense at 3 months) and subsequently returned to being isointense. In T2WI, the signals of the ablated tumours were highly variable during the first 3 months and became strikingly hypointense after 6 months (58.3% strong hypointense at 6 months). Diffusion restriction was prominent during the first 3 months (lowest ADC: 0.62 ± 0.29 × 10(-3) mm(2) s(-1) at 1 month). Contrast enhancement persisted up to 6 months after the procedure. The residual enhancement gradually increased in the dynamic scan and was most prominent in the delay phase.

Conclusion: The MRI of the cryoablated renal tumour follows a typical evolutionary pattern.

Advances In Knowledge: Familiarity of practitioners with the normal post-cryoablation change of RCC on MRI can enable the early detection and prevention of tumour recurrence.

Citing Articles

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Contrast enhancement early after renal malignancy cryoablation: imaging findings associated with benignity.

Grand T, Delavaud C, Dariane C, Ramtohul T, Guinebert S, Helenon O Eur Radiol. 2023; 33(12):8703-8714.

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Role of MRI at 1- and 3-Month Follow-up in Predicting the Likelihood of Tumor Recurrence Following Percutaneous Cryoablation of Renal Tumors.

Obellianne J, De Marini P, Cazzato R, Dalili D, Garnon J, Koch G Cardiovasc Intervent Radiol. 2023; 46(6):777-785.

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