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In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses

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Published on: March 30, 2015

Routine or enhanced imaging to differentiate between type 1 and type 2 papillary renal cell carcinoma.

C-X Li¹, Q Lu², B-J Huang¹

¹Department of Ultrasound, Zhongshan Hospital, Fudan University, No. 180 of Fenglin Road, Shanghai, 200032, China; Shanghai Institute of Medical Imaging, Fudan University, No. 180 of Fenglin Road, Shanghai, 200032, China.

Clinical Radiology

|October 23, 2020

Summary

Type 2 papillary renal cell carcinoma (pRCC) is more aggressive than type 1 pRCC. Imaging reveals type 2 pRCC often presents as cystic-solid lesions with hypervascular and heterogeneous enhancement.

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Area of Science:

Urology
Radiology
Oncology

Background:

Papillary renal cell carcinoma (pRCC) is a subtype of kidney cancer.
Distinguishing between type 1 (T1-pRCC) and type 2 (T2-pRCC) is crucial for prognosis and treatment.
Different imaging modalities may reveal distinct characteristics of each pRCC subtype.

Purpose of the Study:

To investigate and compare the imaging features of T1-pRCC and T2-pRCC using various imaging techniques.
To identify differentiating imaging qualities between the two pRCC subtypes.

Main Methods:

Retrospective study of 107 T1-pRCC and 147 T2-pRCC patients (2007-2019).
Utilized conventional ultrasound (US), contrast-enhanced ultrasound (CEUS), computed tomography (CECT), and magnetic resonance imaging (CE-MRI).
Analyzed and compared imaging features including tumour characteristics, enhancement patterns, and vascularity.

Main Results:

T2-pRCC demonstrated higher Fuhrman grade and increased extrarenal invasion compared to T1-pRCC.
US revealed T2-pRCC more frequently as cystic-solid lesions with higher resistance index on color Doppler.
Contrast-enhanced imaging showed T2-pRCC with blurred borders, hypervascularity, and heterogeneous enhancement more often than T1-pRCC.

Conclusions:

T2-pRCC exhibits more aggressive behavior than T1-pRCC.
Hypervascularity and heterogeneous enhancement are more characteristic of T2-pRCC on contrast-enhanced imaging.
Imaging features can aid in differentiating between T1-pRCC and T2-pRCC.