Obtain a CT Chest (with IV contrast) now before TURBT, not a PET scan
For pretreatment staging of bladder cancer before TURBT, CT chest with IV contrast is the appropriate imaging modality—PET scan is not indicated at this stage. 1
Rationale for CT Chest
The 2024 ACR Appropriateness Criteria clearly states that all patients with urothelial cancer need pulmonary evaluation 1. For patients thought to be at high risk, chest CT is specifically recommended 1. CT chest with IV contrast is preferred over non-contrast CT when evaluating for metastatic disease and lymphadenopathy 1.
The standard staging workup before TURBT includes:
- CT urography (CTU) for the abdomen and pelvis to evaluate the entire urothelial system
- CT chest with IV contrast for pulmonary metastasis evaluation
- This combination provides comprehensive staging for both local and distant disease 1
Why Not PET Scan at This Stage?
PET/CT has a specific but limited role in bladder cancer management. According to the 2018 ACR guidelines on muscle-invasive bladder cancer staging 2:
- PET/CT is primarily useful after initial staging when muscle-invasive disease is confirmed
- It changed treatment plans in 47-68% of patients with established muscle-invasive bladder cancer 2
- However, it is not part of the routine pre-TURBT workup
The clinical sequence matters here: You need TURBT first to determine if the tumor is muscle-invasive or non-muscle-invasive. PET/CT becomes relevant only if muscle invasion is confirmed on pathology 2, 3.
Common Pitfall to Avoid
Do not skip the chest CT thinking you'll get a PET scan instead. The chest CT is essential baseline staging that should be completed before TURBT in high-risk patients. PET scan would only be considered later if pathology shows muscle-invasive disease and you're planning radical cystectomy or systemic therapy 2.