Displaced bladder stone mimics primary prostate cancer/bone metastasis, requiring a SPECT/CT whole-body bone scan for accurate diagnosis

A ۶۹-year-old male patient diagnosed with prostate adenocarcinoma underwent whole-body bone scintigraphy utilizing [۹۹mTc]Tc-methylene diphosphonate (MDP) for initial staging. During the procedure, an unexpected focal uptake of the radiotracer was noted, which appeared to resemble metastasis to the pubic bone or prostate cancer. However, this finding was ultimately determined to be due to a displaced bladder stone located within the prostatic urethra. This case highlights the importance of reviewing the patient's previous imaging studies, utilizing SPECT/CT imaging, and considering urinary tract stones as a potential differential diagnosis when abnormal radiotracer uptake is detected in the pelvic region below the bladder.

کلیدواژه ها:

Prostatic urethra stone ، prostate cancer ، Bone scintigraphy ، SPECT/CT ، Differential diagnosis