Multiple filling defects of ureter (mnemonic)

Last revised by Muhammad Asadullah Munir on 23 Jul 2020

Multiple filling defects within a ureter, as seen on conventional IVU or CT IVU, have a relatively small differential which can be learned using this mnemonic:

  • C: clots
  • U: ureteritis cystica
  • T: transitional cell carcinoma (TCC)


  • S: stones, Stevens-Johnson syndrome
  • L: leukoplakia
  • I: indentation of vessels
  • M: malacoplakia

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