Preoperative chemotherapy in clinically node positive muscle invasive bladder cancer: Radiologic variables can...

Area of Science:

• Urology
• Oncology
• Radiology

Background:

• Bladder cancer with lymph node involvement presents a clinical challenge.
• Radical cystectomy and pelvic lymph node dissection are standard treatments.
• Predicting pathologic nodal status is crucial for treatment planning and prognosis.

Purpose of the Study:

• To evaluate pathologic downstaging after radical cystectomy for lymph node positive urothelial bladder cancer.
• To identify optimal preoperative imaging variables for predicting pathologic nodal status.

Main Methods:

• Retrospective review of 130 patients with clinically node-positive bladder cancer.
• Stratification based on pathologic node status and survival outcomes.
• Analysis of pre- and post-chemotherapy CT scans for lymph node size and morphology.

Main Results:

• 43.4% of patients receiving chemotherapy experienced pathologic T downstaging versus 12.9% with surgery alone.
• Complete nodal response (pN0) occurred in 40.8% post-chemotherapy versus 11.1% with surgery alone.
• An 8 mm nodal size cut-off on post-chemotherapy CT predicted pN+ disease with 72% sensitivity and 80% specificity.

Conclusions:

• Induction chemotherapy can significantly improve nodal response in bladder cancer.
• Post-chemotherapy CT nodal size (≥8 mm) is a valuable predictor of residual nodal disease.
• Imaging can aid in refining treatment strategies for node-positive bladder cancer.