Discussion of Faceless kidney
- The term faceless kidney was originally reported as a CT sign of duplicated collecting system.
- In this setting, faceless refers to the appearance of the kidney on a CT section obtained at a level between duplicated collecting system elements; at this level, the kidney is entirely filled by normal renal parenchymal tissue, thus lacking the typical familiar signature of central renal sinus structures and sinus fat.
- Use of the term has been broadened to include any process that obliterates the anticipated sinus appearance of the kidney. Thus, edema from inflammatory conditions or a more sinister infiltrative process such as lymphoma or transitional cell carcinoma may render the kidney faceless.
- The familiar "face" should always be present, regardless of the imaging technique used.
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 References for Faceless kidney
- Raymond B. Dyer, Michael Y. Chen, and Ronald J. Zagoria. Classic Signs in Uroradiology. RadioGraphics 2004 24: S247-280S.