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Imaging characteristics of papillary renal cell carcinoma by computed tomography scan and magnetic resonance imaging
Author(s) -
TSUDA KYO,
KINOUCHI TOSHIAKI,
TANIKAWA GO,
YASUHARA YUMIKO,
YANAGAWA MASAHIRO,
KAKIMOTO KENICHI,
ONO YUTAKA,
MEGURO NORIO,
MAEDA OSAMU,
ARISAWA JUN,
USAMI MICHIYUKI
Publication year - 2005
Publication title -
international journal of urology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 67
eISSN - 1442-2042
pISSN - 0919-8172
DOI - 10.1111/j.1442-2042.2005.01126.x
Subject(s) - medicine , clear cell , renal cell carcinoma , magnetic resonance imaging , papillary renal cell carcinomas , pathology , carcinoma , clear cell renal cell carcinoma , cell , clear cell carcinoma , differential diagnosis , radiology , nuclear medicine , chemistry , biochemistry
Aim:To analyse the differences in the patterns between clear and papillary renal cell carcinomas using magnetic resonance imaging (MRI) and dual‐phase helical computed tomography (CT).Methods:We examined seven patients with papillary renal cell carcinoma, and six with clear cell carcinoma. The highest attenuation value of tumors in the corticomedullary phase (CMP) and the excretory phase (EP) was measured using the observer‐defined region of interest (ROI). MRI consisted of T 1 ‐weighted and T 2 ‐weighted spin‐echo imaging.Results:All five tumors except for one with papillary renal cell carcinoma showed homogenous hypointensity, but all six tumors with clear cell carcinoma showed heterogeneous hyperintensity on their T 2 ‐weighted images. In the CMP, the mean CT numbers of the papillary renal cell carcinomas were significantly lower than those of the clear cell carcinomas. The mean enhancement of the papillary renal cell carcinomas in the CMP and the EP was significantly lower than that of the clear renal cell carcinomas. The mean CT numbers of the clear cell carcinomas in the CMP were markedly increased from those on the unenhanced CT; those in the EP were decreased gradually. But the mean CT numbers of the papillary renal cell carcinomas in the EP were still slightly more increased than those in the CMP. The enhancement patterns of the papillary renal cell carcinomas in the CMP and the EP were homogenous, but those of the clear cell carcinomas were heterogeneous.Conclusions:We can speculate the differential diagnosis from clear to papillary renal cell carcinoma using MRI and dual‐phase helical CT.