Simple renal cyst (Bosniak classification type 1 cyst): Is follow-up warranted?

Myung Gyu Song, Chang Hee Lee, Kyeong Ah Kim, Cheol Min Park

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Bosniak classification type 1 renal cysts (Type 1 renal cyst) are very frequent and do not warrant follow-up or specific treatment. Here, however, we report two cases of type 1 renal cysts that were diagnosed on CT, US, and gross pathology without a solid component. All two cases were later verified as cases of cystic renal cell carcinoma upon the final histologic report. Therefore, we suggest that type 1 renal cysts are not always benign and regular follow-up imaging studies should be performed.

Original languageEnglish
Pages (from-to)e133-e135
JournalEuropean Journal of Radiology Extra
Issue number3
Publication statusPublished - 2009 Dec


  • CT
  • Carcinoma
  • Cyst
  • Kidney
  • US

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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