Altered Glucose Metabolism Postchemotherapy Precedes PSMA Expression in Poorly Differentiated Prostate Cancer.
case_report · Level V
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- Record sourced from PubMed, PMID 36368043.
- Also identified by DOI 10.1097/RLU.0000000000004440.
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Abstract
A 73-year-old man presented with gastric lesion on upper endoscopy, biopsy-proven as poorly differentiated carcinoma. Staging FDG PET/CT scan showed gastric, intraprostatic, nodal, and extensive osseous lesions. Prostate-specific antigen levels were greater than 1000. The patient was treated as metastatic poorly differentiated prostate cancer with chemotherapy. Posttherapy 18 F-PSMA-1007 and FDG PET/CT scans were obtained. PSMA PET/CT scan revealed extensive disease similar in appearance as staging FDG PET/CT scan, indicating no apparent treatment response. FDG PET/CT scan showed partial metabolic response, correlating with improved prostate-specific antigen levels. This case indicates that chemotherapy-induced changes in glucose metabolism likely precede change in PSMA expression in poorly differentiated prostate cancer.
Medical subject headings
- Positron Emission Tomography Computed Tomography
- Prostatic Neoplasms