68Ga-PSMA-11 PET/MR Can Be False Positive in Normal Prostatic Tissue

Clin Nucl Med. 2019 Apr;44(4):e291-e293. doi: 10.1097/RLU.0000000000002473.

Abstract

Prostate-specific membrane antigen (PSMA) is a transmembrane glycoprotein expressed in the cytosol of normal prostate tissue and highly overexpressed on the membrane of prostate cancer, therefore increasingly used to image prostate cancer. We report a case of a 65-year-old man with two focal PSMA-positive areas on a Ga-PSMA-11 PET/MR, one corresponding to a prostate carcinoma (Gleason score 4 + 3) and another region without any evidence of malignancy, but with corresponding high PSMA-expression on immunohistochemistry.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Edetic Acid / analogs & derivatives*
  • False Positive Reactions
  • Gallium Isotopes
  • Gallium Radioisotopes
  • Humans
  • Magnetic Resonance Imaging*
  • Male
  • Multimodal Imaging*
  • Neoplasm Grading
  • Oligopeptides*
  • Positron-Emission Tomography*
  • Prostate / cytology
  • Prostate / diagnostic imaging*
  • Prostate / pathology
  • Prostatic Neoplasms / diagnostic imaging*
  • Prostatic Neoplasms / pathology

Substances

  • Gallium Isotopes
  • Gallium Radioisotopes
  • Oligopeptides
  • gallium 68 PSMA-11
  • Edetic Acid