Unusual Case of Missed Penile Metastases on 68 Ga-PSMA PET/CT

Clin Nucl Med. 2023 Aug 1;48(8):710-711. doi: 10.1097/RLU.0000000000004731. Epub 2023 Jun 6.

Abstract

A 75-year-old man with a history of previously treated localized prostate cancer and prostate-specific antigen of 4.86 ng/mL was referred for a 68 Ga-prostate-specific membrane antigen PET/CT. PET imaging was reported to be negative. After subsequent review and re-read of the scan, prostate-specific membrane antigen imaging revealed uptake along the penile shaft (SUV max of 14.7). MRI was compatible with tumor. Penile metastases from prostate cancer, although uncommon, do occur and readers are encouraged to distinguish penile metastatic uptake from residual urine in the urethra.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Edetic Acid
  • Gallium Radioisotopes
  • Humans
  • Male
  • Positron Emission Tomography Computed Tomography* / methods
  • Prostate-Specific Antigen
  • Prostatic Neoplasms* / diagnostic imaging
  • Prostatic Neoplasms* / pathology

Substances

  • Gallium-68
  • Gallium Radioisotopes
  • Prostate-Specific Antigen
  • Edetic Acid