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Analysis of the Performance of PSMA Emission Tomography in Patients With Prostate Cancer Treated With HIFU (ECETEP)

10. august 2026 opdateret af: University Hospital, Toulouse

Pilot Study Evaluating PSMA Positron Emission Tomography for Monitoring Clinically Significant Prostate Cancer After Focal HIFU Treatment

There would appear to be a strong interest in functional nuclear imaging for assessing the response to focal PaC treatment. Investigator team hypothesise that the diagnostic performance of PSMA PET is noninferior to that of MRI in detecting clinically significant recurrent PaC after treatment with HIFU. The main objective was to evaluate the diagnostic performance of PSMA PET compared with MRI with reference to the gold standard of prostate biopsy one year after HIFU.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The management of localised prostate cancer (PaC) in men with favourable risk factors is contentious, often involving whole prostate treatment due to its multifocal nature in 40% of cases. Active surveillance (AS) is increasingly used to mitigate overtreatment risks in well-selected patients, supported by long-term data from large cohorts. Focal therapy is emerging as an alternative, aiming for effective cancer control while minimizing morbidity, with radical treatment available for relapse. High-intensity focused ultrasound (HIFU) shows promise for focal therapy, supported by the HIFI-1 study and the HAS report (November 2023), indicating its non-inferiority to radical prostatectomy in controlling intermediate-risk disease with less morbidity.PSMA PET imaging aids in diagnosing and assessing prostate cancer risk at diagnosis and after treatment, guiding management decisions. However, ultrasound artefacts can hinder MRI interpretation post-HIFU treatment. PSMA PET, particularly using PRIMARY score and PROMISE V2 criteria, helps in assessing disease extent, akin to miTNM classification based on cancer location and spread on molecular imaging. Overall, integrating these technologies and criteria improves the precision of prostate cancer diagnosis, risk estimation, and treatment planning The aim of this study is to evaluate the effectiveness of positron emission tomography (PSMA PET) compared with MRI in detecting clinically significant recurrence of prostate cancer (PaC) after treatment with HIFU. The aim is to measure the sensitivity and specificity of these two imaging modalities one year after treatment, with a view to improving the post-treatment follow-up strategy for PaC Patients with low intermediate risk prostate cancer with specific criteria (HAS 2023) will be included in the study. Pre-operative nuclear imaging will be performed in addition to routine diagnostic tests. Routine follow-up at 6 months will include a digital rectal examination (DRE) and PSA and Phi index measurements. At 1 year, in addition to routine follow-up (DRE, PSA, Phi index, MRI and prostate biopsy), patients will undergo a PSMA PET scan.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

30

Fase

  • Fase 4

Kontakter og lokationer

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Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Patient with prostate cancer
  • Age ≥ 70 years (HAS 2023)
  • Life expectancy > 5 years
  • Clinical stage Clinical stage T1c - T2a PSA < 20 ng/ml Biopsy :ISUP 2 unilateral on a maximum of 2 contiguous sextants with or without ipsilateral or contralateral focus ISUP1 single focus or multiple foci if only one ISUP 2 focus on targeted biopsy
  • Imaging Single lesion PIRADS 3 or 4 or 5 Volume of prostate gland < 150 ml
  • Enrolled in a social security scheme
  • Signature of consent

Exclusion Criteria:

  • Evidence of extra-prostatic extension or invasion of the seminal vesicles.
  • Any condition that, in the judgement of the investigators, would interfere with the subject's ability to
  • provide informed consent, comply with study instructions, expose the subject to increased risk, or interfere with the interpretation of study results.
  • Patients deprived of their liberty or under legal protection (curatorship and guardianship, safeguard of justice)
  • Hypersensitivity to the active substances or to any of the excipients
  • Conditions contraindicating magnetic resonance imaging (MRI), such as the presence of internal metallic devices.
  • Chronic kidney disease with an eGFR ≤ 60 mL/min
  • Liver failure

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Diagnostisk
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Nuclear imaging (PSMA PET)
Nuclear imaging (PSMA PET) with intravenous injection of a radiotracer one year after treatment (focal therapy)
Medicin: Nuclear imaging (PSMA PET) with intravenous injection of a radiotracer one year after treatment (focal therapy)
Nuclear imaging (PSMA PET) with intravenous injection of a radiotracer p one year after treatment, multiparametric prostate MRI in accordance with current recommendations, follow-up prostate biopsy as part of routine care.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
diagnostic performance of PSMA-PET
Tidsramme: 12 months after treatment
Measurement of the sensitivity and specificity of PSMA PET in the diagnosis of recurrence of significant prostate cancer one year after treatment with HIFU: the result will be considered positive (indicating a recurrence of prostate cancer) if the PSMA intensity score (SUV max) is 4.0 or higher; the presence of a recurrence of prostate cancer at the 1-year follow-up will be confirmed by biopsies (Gold Standard).
12 months after treatment

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University Hospital, Toulouse

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. oktober 2026

Primær færdiggørelse (Anslået)

1. oktober 2028

Studieafslutning (Anslået)

1. oktober 2028

Datoer for studieregistrering

Først indsendt

10. august 2026

Først indsendt, der opfyldte QC-kriterier

10. august 2026

Først opslået (Faktiske)

14. august 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

14. august 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

10. august 2026

Sidst verificeret

1. august 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • RC31/25/0648
  • 2026-525181-22-00 (Ctis)

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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