Small renal cell carcinoma: MRI with pathologic correlation

Hiroshi Shinmoto, Yuji Yuasa, Akihiro Tanimoto, Yoshiaki Narimatsu, Masahiro Jinzaki, Kyoichi Hiramatsu, Makio Mukai

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


The MRI features of small renal cell carcinomas (RCCs) were retrospectively reviewed and correlated with histology in 24 patients. MRI features on both T1- and T2-weighted images were classified into hypointensity, isointensity, and hyperintensity. Each tumor was pathologically classified into four types: alveolar, papillary, tubular, and cystic. These findings were correlated with MR signal intensities. Alveolar tumors showed hypointensity to isointensity on T1-weighted image and isointensity to hyperintensity on T2-weighted image. In contrast, all papillary tumors showed hypointensity on T2-weighted image. Four of six tumors with hypointensity on T2-weighted image were caused by hemosiderin deposition, hemorrhage, and necrosis. However, there were two papillary RCCs that showed hypointensity on T2-weighted image despite no hemosiderin deposition and no hemorrhage. We conclude that papillary RCC is associated with T2-hypointense appearance as well as hemosiderin deposition, hemorrhage, and necrosis.

Original languageEnglish
Pages (from-to)690-694
Number of pages5
JournalJournal of Magnetic Resonance Imaging
Issue number3
Publication statusPublished - 1998 May


  • Hemosiderin
  • MRI
  • Papillary renal cell carcinoma
  • Renal neoplasm

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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