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Summary
Radiotherapy did not alter blood group antigens on bladder tumors, but it may affect normal bladder tissue. Thiotepa instillation could impact antigen measurements in both tumor and normal tissues.
Area of Science:
- Oncology
- Immunology
- Urology
Background:
- Blood group antigens on bladder carcinoma can predict tumor potential.
- Reliability of red cell adherence testing after radiotherapy is unclear.
Purpose of the Study:
- To investigate the effect of radiotherapy on blood group antigens in bladder tumors and adjacent epithelium.
- To assess antigen expression before and after different radiation doses.
Main Methods:
- Examined red cell antigens on bladder tumors and uninvolved epithelium.
- Studied patients receiving 2000 rad before cystectomy and 6000 rad as definitive therapy.
- Analyzed antigen presence before and after radiotherapy.
Main Results:
- Radiation therapy alone did not affect blood group antigen measurements on bladder carcinoma in either patient group.
- Uninvolved bladder mucosa showed alterations in blood group antigen measurements post-radiotherapy in some cases.
- Intravesical thiotepa instillation potentially affected antigen measurements in both tumor and uninvolved mucosa.
Conclusions:
- Radiotherapy alone does not alter blood group antigen expression on bladder tumors.
- Changes in antigen expression may occur in normal bladder mucosa after radiotherapy.
- Thiotepa may influence antigen expression, necessitating further investigation.