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Impact of total PSA, PSA doubling time and PSA velocity on detection rates of 11C-Choline positron emission tomography in recurrent prostate cancer

Rybalov, M., Breeuwsma, A. J., Leliveld, A. M., Pruim, J., Dierckx, R. A. & de Jong, I. J., Apr-2013, In : World journal of urology. 31, 2, p. 319-323 5 p.

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  • Impact of total PSA, PSA doubling time and PSA velocity on detection rates

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DOI

PURPOSE: To evaluate the effect of total PSA (tPSA) and PSA kinetics on the detection rates of (11)C-Choline PET in patients with biochemical recurrence (BCR) after radical prostatectomy (RP) or external beam radiotherapy (EBRT).

METHODS: We included 185 patients with BCR after RP (PSA >0.2 ng/ml) or after EBRT (ASTRO definition). After injection of 400 MBq 11C-Choline i.v., a scan was made using the ECAT HR + PET camera with CT fusion images or Siemens mCT PET/CT. Biopsy-proven histology, confirmative imaging (CT or bone scan) and/or clinical follow-up (PSA) were used as composite reference. Statistical analysis was performed using PASW Statistics 18.

RESULTS: 11C-Choline PET was positive in 124/185 cases (65%) (in 22/61 (36%) after RP, 102/124 (82%) after EBRT). In 79 patients a local recurrence was identified, and 45 patients showed locoregional metastases on PET/CT. In 20 cases a proven false-negative PET scan was observed. Positive PET scans were confirmed by histology in 87/124 (70%) cases, by confirmatory imaging in 34/124 (28%) and by clinical follow-up after salvage treatment in 3 (2%) cases. The ROC analysis to detect a recurrence showed significant difference in area under the curve (AUC) of tPSA 0.721(p < 0.001) and PSA velocity 0.730 (p < 0.001). PSA doubling time showed no significant difference with an AUC of 0.542 (p = 0.354). Detection rates are <50% in tPSA <2 ng/ml and/or PSA velocity <1 ng/ml/year.

CONCLUSIONS: Total serum PSA and PSA velocity have significant effect on the detection rates of 11C-Choline PET/CT in men with a BCR after RP or EBRT.

Original languageEnglish
Pages (from-to)319-323
Number of pages5
JournalWorld journal of urology
Volume31
Issue number2
Publication statusPublished - Apr-2013

    Keywords

  • Aged, Carbon Radioisotopes, Choline, Disease Progression, Humans, Kallikreins, Male, Multimodal Imaging, Neoplasm Recurrence, Local, Positron-Emission Tomography, Prostate-Specific Antigen, Prostatectomy, Prostatic Neoplasms, Radiopharmaceuticals, Radiotherapy, Retrospective Studies, Sensitivity and Specificity, Time Factors, Tomography, X-Ray Computed, Tumor Markers, Biological

ID: 5837057