EDiR: Question of the day: #3

We dare you to solve one of the hardest questions of the EDiR examination!
The European Board of Radiology raffles amongst the winners an examination place for the EDiR that will take place at the ECR 2019.
The registration for the ECR 2019 is also included!

73-year-old male. Referred for macroscopic haematuria. He was taking anticoagulants and there were stones in the right kidney. Axial US image of the bladder was performed. Which of the following could cause the appearance seen on these images?

Please, click here to enter your answer. Solve the question before 13:30.

Winner will be announced here, on the EBR blog, at 14:00.

Good luck!

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