Potential overstaging of bladder cancer by computerized tomography scanning

Area of Science:

• Uro-oncology
• Medical imaging
• Pathology

Background:

• Accurate staging is crucial for effective bladder cancer treatment.
• Computerized tomography (CT) is a common imaging modality used in bladder cancer staging.

Observation:

• Four cases of bladder cancer overstaged by CT were identified.
• In two cases, CT scans were performed after cystoscopy and bladder biopsy.
• In the other two cases, CT scans were performed before biopsy.

Findings:

• Biopsy-induced artifacts on post-biopsy CT scans led to overstaging in two patients.
• In pre-biopsy CT scans, interpreted perivesical and periprostatic infiltration was not confirmed by surgical pathology in the other two patients.
• These findings suggest CT overstaging can occur due to both post-procedural artifacts and interpretation of non-existent infiltration.

Implications:

• Overstaging by CT can lead to unnecessary aggressive treatments and patient anxiety.
• Refined CT interpretation protocols, especially concerning post-biopsy changes, are needed.
• Consideration of biopsy timing relative to CT imaging may improve staging accuracy in bladder cancer.