Pilot Imaging Study With 89Zr-Trastuzumab in HER2-positive Metastatic Breast Cancer Patients : Correlation With FDG-PET/CT and Anatomopathological Results (IJBMNZrT003)

NCT01420146 Phase 1 COMPLETED Results posted

Evaluation of the diagnostic potential of HER2 imaging using zirconium 89 labelled trastuzumab.

Details

Lead sponsor	Jules Bordet Institute
Phase	Phase 1
Status	COMPLETED
Enrolment	20
Start date	2011-08
Completion	2015-09

Conditions

• Breast Neoplasms
• Secondary
• HER2 Positive Carcinoma of Breast

Interventions

• Zr89-trastuzumab

Primary outcomes

• Test the Diagnostic Accuracy of the HER2 Imaging Using the Labelled Monoclonal Antibody Trastuzumab by Correlating the HER2 PET/CT Imaging With the FDG-PET/CT and Molecular Characterization of Tumor Samples With Discordant Image Findings — 4 years
  A visual 'patient-based' classification capturing the whole disease burden was developed by using a side-by-side display, comparing baseline FDG-PET/CT(showing all FDG-positive mets independent of their HER2-imaging status) \& day4 HER2-PET/CT. Pts were grouped into 4 HER2-PET/CT patterns according to the proportion of FDG avid tumour load showing relevant 89Zr-T uptake. Pattern A: entire tumor load showed pertinent tracer uptake; B: dominant part of tumour load showed tracer uptake; C: minor part of tumor load showed tracer uptake; D: entire tumor load lacked tracer uptake. Patterns A+B='HER2-positive' \& C+D='HER2-negative'. In the 20 pts: 4 pts were classified "A", 5"B", 1"C" \& 10"D". This classification indicates substantial heterogeneity of 89Zr-T uptake within this so called 'HER2-positive' pt population. After dichotomization, 11(55%) pts were considered as HER2-PET/CT negative. Furthermore, HER2-PET/CT revealed intrapatient heterogeneity of tumour uptake(pts classified B or C).

Countries

Belgium