Intertumoral Heterogeneity of 18F-FDG and 68Ga-PSMA Uptake in Prostate Cancer Pulmonary Metastases

Clin Nucl Med. 2019 Jan;44(1):e28-e32. doi: 10.1097/RLU.0000000000002367.

Abstract

We present a case of a 61-year-old man with history of prostate cancer and rising PSA levels referred for restaging. Ga-PSMA-11 PET/CT identified 2 lung nodules with low and moderate PSMA uptake. Subsequent F-FDG PET/CT showed high hypermetabolism in the nodule with low PSMA uptake, and low hypermetabolism in the nodule with moderate PSMA uptake. The isolated pulmonary findings and metabolic appearance is an atypical presentation of prostate cancer metastases and raised concern for a second primary malignancy. Fine-needle aspiration of the F-FDG active lung nodule confirmed metastatic prostatic adenocarcinoma that subsequently responded to androgen deprivation therapy and abiraterone acetate.

Publication types

  • Case Reports

MeSH terms

  • Edetic Acid / analogs & derivatives
  • Fluorodeoxyglucose F18
  • Gallium Isotopes
  • Gallium Radioisotopes
  • Humans
  • Lung Neoplasms / diagnostic imaging*
  • Lung Neoplasms / secondary
  • Male
  • Middle Aged
  • Oligopeptides
  • Positron Emission Tomography Computed Tomography*
  • Prostatic Neoplasms / diagnostic imaging*
  • Prostatic Neoplasms / pathology
  • Radiopharmaceuticals

Substances

  • Gallium Isotopes
  • Gallium Radioisotopes
  • Oligopeptides
  • Radiopharmaceuticals
  • gallium 68 PSMA-11
  • Fluorodeoxyglucose F18
  • Edetic Acid