E-ISSN: 1305-3612
Clear cell renal cell carcinoma and papillary renal cell carcinoma: differentiation of distinct histological types with multiphase CT
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Abdominal Imaging - Original Article
VOLUME: 19 ISSUE: 5
P: 387-392
September 2013

Clear cell renal cell carcinoma and papillary renal cell carcinoma: differentiation of distinct histological types with multiphase CT

Diagn Interv Radiol 2013;19(5):387-392
DOI: 10.5152/dir.2013.13068
Pal Bata 1
Janos Gyebnar 2
David Laszlo Tarnoki 1
Adam Domonkos Tarnoki 1
Dora Kekesi 1
Attila Szendroi 1
Bence Fejer 1
A. Marcell Szasz 3
Peter Nyirady 4
Kinga Karlinger 5
Viktor Berczi 5
1. Departments of Radiology,Semmelweis University School of Medicine, Budapest, Hungary.
2. Department of Radiology,Semmelweis University School of Medicine, Budapest, Hungary.
3. Department of Pathology ,Semmelweis University School of Medicine, Budapest, Hungary.
4. Department of Urology ,Semmelweis University School of Medicine, Budapest, Hungary.
5. Department of Radiology ,Semmelweis University School of Medicine, Budapest, Hungary.
No information available.
No information available
Received Date: 20.02.2013
Accepted Date: 02.04.2013
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ABSTRACT

PURPOSE

Conventional clear cell renal cell carcinoma (ccRCC) and papillary renal cell carcinoma (pRCC) have different behavioral characteristics and clinical management strategies (nephrectomy vs. nephron-sparing surgery). Our aim was to retrospectively evaluate the contrast enhancement pattern of ccRCC and pRCC and evaluate its possible diagnostic role for preoperative differentiation using a standardized protocol.

MATERIALS AND METHODS

Quadriphasic multidetector computed tomography (CT) images (unenhanced, corticomedullary, nephrographic, and excretory phases) of 19 patients with 20 ccRCC and 14 patients with 15 pRCC lesions (mean ages, 62.3±14.1 and 61.4±13.7 years, respectively) were reviewed retrospectively. The attenuation characteristics were compared with the attenuation of the normal renal cortex using either multiple 10 mm2 regions of interest or whole tumor attenuation measurements. The degree of contrast enhancement was also compared.

RESULTS

Univariate analysis revealed that ccRCC lesions showed higher mean attenuation values on the corticomedullary and nephrographic phases compared with pRCC masses (P < 0.05) using both measurement techniques.

CONCLUSION

The findings underscore the importance of multiphase CT in the differentiation of these two subtypes of RCC using standard assessment techniques. The measurement of the degree of enhancement on contrast-enhanced multidetector CT may be a simple and useful method to radiologically differentiate between the two histological types of RCC.