Abstract:
PURPOSE/BACKGROUND:[18F]fluoroethylcholine (18FECH) has been shown to be a valuable PET-tracer in recurrent prostate cancer (PCa), but still has limited accuracy. RM2 is a gastrin-releasing peptide receptor (GRPr) antagonist that binds to GRPr on PCa cells. Recent studies suggest that GRPr imaging with PET/CT is a promising technique for staging and restaging of PCa. We explore the value of GRPr-PET using the 68Ga-labeled GRPr antagonist RM2 in a selected population of patients with biochemically recurrent PCa and a negative/inconclusive 18FECH-PET/CT. MATERIAL AND METHODS:In this retrospective study 16 men with biochemical PCa relapse and negative (n = 14) or inconclusive (n = 2) 18FECH-PET/CT underwent whole-body 68Ga-RM2-PET/CT. Mean time from 18FECH-PET/CT to 68Ga-RM2-PET/CT was 6.1 ± 6.8 months. Primary therapies in these patients were radical prostatectomy (n = 13; 81.3%) or radiotherapy (n = 3; 18.7%). 14/16 patients (87.5%) had already undergone salvage therapies because of biochemical relapse prior to 68Ga-RM2-PET/CT imaging. Mean ± SD PSA at 68Ga-RM2-PET/CT was 19.4 ± 53.5 ng/ml (range 1.06-226.4 ng/ml). RESULTS:68Ga-RM2-PET/CT showed at least one region with focal pathological uptake in 10/16 patients (62.5%), being suggestive of local relapse (n = 4), lymph node metastases (LNM; n = 4), bone metastases (n = 1) and lung metastasis with hilar LNM (n = 1). Seven of ten positive 68Ga-RM2 scans were positively confirmed by surgical resection and histology of the lesions (n = 2), by response to site-directed therapies (n = 2) or by further imaging (n = 3). Patients with a positive 68Ga-RM2-scan showed a significantly higher median PSA (6.8 ng/ml, IQR 10.2 ng/ml) value than those with a negative scan (1.5 ng/ml, IQR 3.1 ng/ml; p = 0.016). Gleason scores or concomitant antihormonal therapy had no apparent impact on the detection of recurrent disease. CONCLUSION:Even in this highly selected population of patients with known biochemical recurrence but negative or inconclusive 18FECH-PET/CT, a 68Ga-RM2-PET/CT was helpful to localize PCa recurrence in the majority of the cases. Thus, 68Ga-RM2-PET/CT deserves further investigation as a promising imaging modality for imaging PCa recurrence.
journal_name
Eur J Nucl Med Mol Imagingauthors
Wieser G,Popp I,Christian Rischke H,Drendel V,Grosu AL,Bartholomä M,Weber WA,Mansi R,Wetterauer U,Schultze-Seemann W,Meyer PT,Jilg CAdoi
10.1007/s00259-017-3702-8subject
Has Abstractpub_date
2017-08-01 00:00:00pages
1463-1472issue
9eissn
1619-7070issn
1619-7089pii
10.1007/s00259-017-3702-8journal_volume
44pub_type
杂志文章abstract:PURPOSE:To compare the performance characteristics of positron emission mammography (PEM) with those of whole-body PET (WBPET) and PET/CT in women with newly diagnosed breast cancer. METHODS:A total of 178 women consented to PEM for presurgical planning in an IRB-approved protocol and also underwent either WBPET (n = ...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章,评审
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章,评审
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章,多中心研究
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更新日期:2012-01-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
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更新日期:2020-09-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
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更新日期:2008-03-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
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更新日期:2020-06-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
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更新日期:2010-11-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
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更新日期:2019-03-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 临床试验,杂志文章
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更新日期:2003-08-01 00:00:00