Back to Search
Start Over
Dynamic patterns of [68Ga]Ga-PSMA-11 uptake in recurrent prostate cancer lesions
- Source :
- European Journal of Nuclear Medicine and Molecular Imaging. 47:160-167
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- PURPOSE Dual-time point PET/CT scanning with [68Ga]Ga-PSMA-11 in the diagnosis of prostate cancer (PC) has been advanced as a method to increase detection of PC lesions, particularly at early stages of biochemical recurrence and as a potential means to aid the discrimination between benign and pathological prostate-specific membrane antigen (PSMA) uptake. However, the assumption that all PC lesions uniformly exhibit increasing tracer uptake at delayed imaging has not yet been investigated, which this present study aims to address. METHODS One hundred consecutive patients with biochemically recurrent PC who received standard and late [68Ga]Ga-PSMA-11 PET/CT (by local protocol at 1.5 h "standard" and 2.5 h p.i. "late") underwent retrospective evaluation. All lesions with a tracer uptake above local background were analysed with regard to their maximum standardised uptake values at standard and late images (SUVmax) and characterised according to their morphological characteristics. RESULTS Seventy-nine of 100 patients had PSMA-positive scans, in whom a total of 185 individual PSMA-positive lesions were identified. These were morphologically characterised as bone lesions (n = 48), solid organ lesions (n = 3), lymph node (LN) lesions (n = 78) and locally recurrent lesions in the prostatic fossa or seminal vesicles (n = 56). The relative uptake between standard and late imaging was considered; all lesions classified as local recurrence presented with increasing (86%) or stable patterns of tracer uptake (14%). In contrast, only 58% of bone lesions exhibited increasing tracer uptake, with 21% exhibiting a stable pattern and 21% exhibiting a decreasing tracer uptake at late imaging. CONCLUSION A heterogeneous pattern of dynamic tracer uptake was observed, with a largely increasing pattern observed for locally recurrent lesions and lymph nodes and a significant proportion of bone lesions exhibiting decreasing tracer uptake. The results are of significance not only in the imaging and identification of PC lesions, but they also have implications for PSMA-directed ligand therapy.
- Subjects :
- Biochemical recurrence
PET-CT
Pathology
medicine.medical_specialty
medicine.diagnostic_test
business.industry
General Medicine
medicine.disease
030218 nuclear medicine & medical imaging
03 medical and health sciences
Prostate cancer
0302 clinical medicine
Isotopes of gallium
medicine.anatomical_structure
Positron emission tomography
Prostate
030220 oncology & carcinogenesis
medicine
Radiology, Nuclear Medicine and imaging
Lymph
610 Medicine & health
business
Lymph node
Subjects
Details
- ISSN :
- 16197089 and 16197070
- Volume :
- 47
- Database :
- OpenAIRE
- Journal :
- European Journal of Nuclear Medicine and Molecular Imaging
- Accession number :
- edsair.doi.dedup.....fa25f5f15dcff2ac704a695c54ed5122
- Full Text :
- https://doi.org/10.1007/s00259-019-04545-8