[Indications for lymphography in bladder cancer]

Area of Science:

• Urology
• Oncology
• Radiology

Background:

• Bladder cancer staging is crucial for treatment planning.
• Understanding lymph node metastasis patterns is essential for accurate staging and prognosis.

Purpose of the Study:

• To determine the frequency of lymphogenic metastatic spread in bladder cancer based on local tumor extent.
• To define indications for lymphography in primary bladder cancer.
• To evaluate the role of X-ray monitoring and repeated lymphography in detecting metastases and assessing treatment response.

Main Methods:

• Analysis of clinical and X-ray findings in 333 bladder cancer patients.
• Correlation of lymph node metastasis frequency with tumor stages (T1-T4b).
• Identification of common sites of metastasis (external inguinal, lumbar, pelvic lymph nodes).

Main Results:

• No metastases in T1 and T2 stages.
• Metastasis rates increased with tumor stage: T3a (11.5%), T3b (30.3%), T4a (36.4%), T4b (50%).
• External inguinal lymph nodes were the primary site; lumbar involvement correlated with pelvic lymphatic spread.

Conclusions:

• Lymphogenic metastasis in bladder cancer is strongly correlated with local tumor progression.
• Lymphography is indicated for T3a, T3b, and T4a stages.
• X-ray monitoring and repeat lymphography aid in metastasis detection and treatment evaluation.