Perinephric Urinoma Due to Locally Advanced Recto-Sigmoid Tumor: Incidental Finding on Bone Scan

Abstract

We are presenting a 59 years old man with locally advanced recto-sigmoid colon cancer; complaining of left flank pain and bone scan was done to rule out bone metastases. Findings in bone scan were suggesting left renal obstruction, but further SPECT/CT imaging to localize the uptake revealed a perinephric collection likely due to leak from the left ureter close to tumor site.

Incidental detection of perinephric urinary leak on bone scintigraphy in a patient with urinary bladder carcinoma

“…Although there are reports of urinary leak diagnosed from other tracers,[ 4 5 6 7 ] the diagnosis of unsuspected urinary leak from bone scan is rare. [ 8 9 ] In this patient, hybrid scintigraphic imaging diagnosed an unsuspected urinary leak and also detected nonskeletal distant metastases, thereby aiding in clinical management.…”