Open AccessBrachytherapy seeds as a nidus for urethral stone formation: A case report
Author(s) -
Kamisawa Ken,
Kosaka Takeo,
Hongo Hiroshi,
Mizuno Ryuichi,
Oya Mototsugu
Publication year - 2019
Publication title -
iju case reports
Language(s) - English
Resource type - Journals
ISSN - 2577-171X
DOI - 10.1002/iju5.12082
Subject(s) - brachytherapy , medicine , cystoscopy , prostate cancer , prostate brachytherapy , transurethral resection of the prostate , prostate , urology , surgery , radiation therapy , cancer , urinary system
Iatrogenic foreign bodies can cause urolithiasis. However, iodine seeds used in brachytherapy are not a known cause of stone formation. We report a rare case of urethral stone formation with brachytherapy seeds determined to be the nidus, which occurred 9 years after permanent seed brachytherapy for prostate cancer. Case presentation An 87‐year‐old man with a history of prostate cancer treated with brachytherapy presented to our hospital with macroscopic hematuria. He underwent transurethral resection of the mucosa with erythema 4 years after brachytherapy. Cystoscopy revealed urethral stones on the bladder neck. Transurethral lithotripsy was performed and the nidus of stone formation was revealed to be an aggregate of iodine seeds. Conclusion In the course of the long‐term follow‐up after brachytherapy for prostate cancer, the possibility of the formation of the urethral stone associated with iodine seeds should be considered when gross hematuria is observed.