Abstract
Purpose
To investigate the utility of 11C-acetate positron emission tomography/computed tomography (PET/CT) for staging of bladder cancer and response assessment after neoadjuvant chemotherapy.
Procedures
Seventeen patients underwent 11C-acetate PET/CT ≤1 month before radical cystectomy (RC) and pelvic lymph node dissection (PLND). Ten patients had undergone neoadjuvant chemotherapy prior to PET. Histopathology from RC and PLND (n = 16) or nodal biopsy (n = 1) served as gold standard.
Results
Eight of 10 residual tumors showed abnormal 11C-acetate uptake; two cases of residual TiS were false negative, three cases were false positive, and three true negative. Three patients showed true positive uptake in LN. False positive uptake occurred in 14 LN regions secondary to granulomatous disease after prior intravesical Bacillus Calmette–Guerin (BCG) therapy.
Conclusions
11C-acetate has good sensitivity for bladder cancer and LN metastases. However, false positive uptake due to inflammation or granulomatous infection can occur, limiting the staging utility of 11C-acetate after prior intravesical BCG therapy.
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Schöder, H., Ong, S.C., Reuter, V.E. et al. Initial Results with 11C-Acetate Positron Emission Tomography/Computed Tomography (PET/CT) in the Staging of Urinary Bladder Cancer. Mol Imaging Biol 14, 245–251 (2012). https://doi.org/10.1007/s11307-011-0488-0
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DOI: https://doi.org/10.1007/s11307-011-0488-0