Distant metastasis from bilharzial bladder cancer

Area of Science:

• Oncology
• Urology
• Cancer Research

Background:

• Bilharzial bladder cancer (BBC) is endemic in certain regions.
• Improved survival rates have led to increased observation of distant metastasis in BBC.
• Understanding metastasis patterns is crucial for managing BBC.

Purpose of the Study:

• To determine the rate of distant metastasis in bilharzial bladder cancer.
• To identify independent risk factors for distant metastasis in BBC.
• To evaluate the impact of different treatment modalities on metastasis.

Main Methods:

• Retrospective analysis of 357 bilharzial bladder cancer patients treated between 1981-1990.
• Patients received cystectomy alone, with preoperative radiotherapy, or with postoperative irradiation.
• Statistical analysis included univariate and multivariate assessments of risk factors.

Main Results:

• The overall 5-year rate of distant metastasis was 23%, consistent across treatment groups.
• Independent risk factors for distant metastasis were pelvic lymph node involvement, pathologic stage, and histopathologic grade.
• Patients with no independent risk factors had 11% distant metastasis; those with multiple had 51%.

Conclusions:

• Distant metastasis occurs in 23% of bilharzial bladder cancer patients.
• Pelvic lymph node involvement, pathologic stage, and histopathologic grade are key independent predictors of metastasis.
• Histologic type, local recurrence, and radiotherapy timing were not independent risk factors.