1. Clinical significance of atypical 68 Ga-DOTATOC prostatic uptake on PET/CT: A ten-year review.
- Author
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Gossili F, Almasi CE, and Zacho HD
- Subjects
- Humans, Male, Middle Aged, Aged, Aged, 80 and over, Octreotide, Positron Emission Tomography Computed Tomography methods, Prostate diagnostic imaging, Gallium Radioisotopes, Clinical Relevance, Positron-Emission Tomography methods, Somatostatin, Receptors, Somatostatin, Prostatic Neoplasms diagnostic imaging, Neuroendocrine Tumors diagnostic imaging, Organometallic Compounds
- Abstract
Objective: Gallium-68-DOTA-D-Phe1-Try3-Octreotide (
68 Ga-DOTATOC) is a radiolabeled somatostatin receptor (SSTR) analog that is widely used in the imaging of neuroendocrine tumors (NET). Benign and malignant prostate tumors have been observed to express SSTR. Diffuse symmetric DOTATOC uptake in the prostate is a normal positron emission tomography (PET) finding. The aim of this study was to evaluate the frequency and clinical significance of incidental atypical prostatic uptake in men undergoing68 Ga-DOTATOC PET/computed tomography(CT)., Subjects and Methods: A retrospective review of consecutive male patients who underwent68 Ga-DOTATOC PET/CT studies at Aalborg University Hospital, Denmark, from November 2010 to April 2020 was performed. Positron emission tomography/CT reports were searched for text words or phrases indicating incidental atypical prostatic uptake. In the resulting cohort, PET/CT were re-evaluated, and DOTATOC uptake in the prostate gland was categorized as focal, diffuse or mixed. The intensity of the uptake was visually graded using the Krenning visual score. Follow-up was based on all available clinical, biochemical, imaging, and pathology follow-up., Results: A total of 178 male patients underwent 19368 Ga-DOTATOC PET/CT scans. Incidental atypical uptake of68 Ga-DOTATOC on PET/CT in the prostatic bed was observed in eight patients (4.5%) (mean age 67 years, range 58-85 years). Six patients (75%) had diffuse uptake; two (25%) patients had focal uptake. Four patients out of eight with incidental findings (50%) had uptake less than or equal to that of the liver (Krenning score 2); four patients (50%) had uptake greater than that of the liver (score 3). All patients had measurements of serum prostate-specific antigen and were referred for urological evaluation. Five patients (62%) underwent a transrectal ultrasound, and three required a biopsy of the prostate. No cases of prostate malignancy (including prostatic cancer) were diagnosed., Conclusion: During a 10-year period, we found that 4.5% of men exhibited prostate incidentalomas on68 Ga-DOTATOC PET/CT. No malignancy was found in the prostate in this population. Our data indicate absent malignancy among incidental68 Ga-DOTATOC findings in the prostate. more...- Published
- 2023
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