68Ga-PSMA PET/CT in prostate cancer

Rev Esp Med Nucl Imagen Mol (Engl Ed). 2018 Mar-Apr;37(2):130-138. doi: 10.1016/j.remn.2017.07.004. Epub 2017 Sep 21.
[Article in English, Spanish]

Abstract

Positron emission tomography/computed tomography (PET/CT) with 68Ga-PSMA is a non-invasive diagnostic technique to image prostate cancer with increased prostate-specific membrane antigen (PSMA) expression. PSMA is a transmembrane protein present in all prostatic tissues. Increased PSMA expression is seen in several malignancies, although prostate cancer is the tumour where it presents higher concentrations. Almost all prostate adenocarcinomas show PSMA expression in most of lesions, primary and metastatic. Immunohistochemistry has demonstrated that the expression of PSMA increases in patients with de-differentiated, metastatic or hormone-refractory tumours. Moreover, the expression level of PSMA has a prognostic value for disease outcome. PET measures the three-dimensional distribution of 68Ga-PSMA, producing semi-quantitative images that allow for non-invasive assessment of PSMA expression.

Keywords: Cáncer de próstata; PET/CT; PET/TC; PSA; PSMA; Prognosis; Pronóstico; Prostate cancer; Recidiva; Relapse.

Publication types

  • Review

MeSH terms

  • Adenocarcinoma / chemistry
  • Adenocarcinoma / diagnostic imaging*
  • Adenocarcinoma / pathology
  • Adenocarcinoma / therapy
  • Aged
  • Edetic Acid / analogs & derivatives*
  • Edetic Acid / chemical synthesis
  • Edetic Acid / pharmacokinetics
  • Follow-Up Studies
  • Gallium Isotopes
  • Gallium Radioisotopes / pharmacokinetics*
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Male
  • Middle Aged
  • Neoplasm Staging
  • Oligopeptides / chemical synthesis
  • Oligopeptides / pharmacokinetics*
  • Positron Emission Tomography Computed Tomography / methods*
  • Prognosis
  • Prostate-Specific Antigen / analysis
  • Prostate-Specific Antigen / biosynthesis
  • Prostate-Specific Antigen / genetics
  • Prostatic Neoplasms / chemistry
  • Prostatic Neoplasms / diagnostic imaging*
  • Prostatic Neoplasms / pathology
  • Prostatic Neoplasms / therapy
  • Radiometry
  • Radiopharmaceuticals / chemical synthesis
  • Radiopharmaceuticals / pharmacokinetics*
  • Recurrence
  • Sensitivity and Specificity
  • Tissue Distribution
  • Tumor Burden

Substances

  • Gallium Isotopes
  • Gallium Radioisotopes
  • Oligopeptides
  • Radiopharmaceuticals
  • gallium 68 PSMA-11
  • Gallium-68
  • Edetic Acid
  • Prostate-Specific Antigen