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How long is urinary cytology abnormal after flexible cystoscopy?
Rhona J McVey1, Ranjiv V Persad, Stephen C W Brown
1Department of Cytopathology, Manchester Royal Infirmary, Manchester, UK.
BJU International
|August 27, 2004
Summary
Urinary cytology changes after flexible cystoscopy are temporary, resolving within a day. Schedule urine cytology tests more than 24 hours post-procedure to avoid artifactual findings.
Area of Science:
- Urology
- Cytopathology
Background:
- Flexible cystoscopy is a common urological procedure.
- Urinary cytology is used for diagnosing bladder conditions.
- Instrumentation may affect urinary cytology results.
Purpose of the Study:
- To investigate transient urinary cytological alterations following flexible cystoscopy.
- To establish optimal timing for post-procedure urinary cytology analysis.
Main Methods:
- 48 patients undergoing flexible cystoscopy provided urine samples.
- Samples collected pre-procedure and at 8 time points up to 28 days post-procedure.
- Papanicolaou-stained cytospin preparations analyzed by cytopathologists.
Main Results:
- Significant increase in urothelial cell cellularity immediately post-cystoscopy.
- Transient morphological changes observed: columnar cells, papillary clusters, atypia.
- Most cytological changes resolved within 24 hours of the procedure.
Conclusions:
- Post-flexible cystoscopy urinary cytology changes are transient.
- Urine samples collected >24 hours after instrumentation are unlikely to show artefactual changes.
- Clinicians should report cystoscopy timing to prevent misinterpretation of cytology results.