Comparison of Changes in Tumor Burden in 68Ga-PSMA-11 PET/CT and 177Lu-PSMA SPECT/CT in Metastatic Castration-resistant Prostate Cancer

Comparison of Changes in Tumor Burden (Toral Tumor Volume [TMTV] and Total Lesion Activity [TLA]) in 68Ga-PSMA-11 PET/CT and 177Lu-PSMA SPECT/CT in the Monitoring of Metastatic Castration-resistant Prostate Cancer Treated With 177Lutetium-PSMA-617

To demonstrate the prognostic value of using post-therapy 177Lu-PSMA SPECT/CT versus 68Ga-PSMA-11 PET/CT in mCPRC patients progressing despite chemotherapy and treated with 177Lu-PSMA.

Since few years, therapy by 177Lu-PSMA in nancy hospital began. A lot's of datas were collected. Prostate cancer is the number one killer in france and this is very important to find a diagnostic tool.

The hypothesis of this study is to demonstrate the prognostic value of using post-therapy 177Lu-PSMA SPECT/CT versus 68Ga-PSMA-11 PET/CT in mCPRC patients progressing despite chemotherapy and treated with 177Lu-PSMA.

Inclusion Criteria:

• patient who received a dose of 177lu-PSMA
• patient who had imaging by 68Ga-PSMA
• patient treated in Nancy hospital for its cancer prostate

Exclusion Criteria:

• no social security
• no acceptation to participating in retrospective study