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Inverted papilloma of the urinary bladder
1Division of Urology, Department of Surgery, Veterans General Hospital-Kaohsiung, Taiwan, R.O.C.
Zhonghua Yi Xue Za Zhi = Chinese Medical Journal; Free China Ed
|January 1, 1996
Summary
Inverted papillomas of the urinary bladder are rare, benign tumors. Transurethral resection is effective, but malignancy must be excluded, and annual follow-up is recommended.
Area of Science:
- Urology
- Oncology
Background:
- Inverted papillomas are uncommon in the lower urinary tract.
- These tumors are histologically benign but carry a low risk of malignancy.
- Coexistence with transitional cell carcinoma has been documented.
Purpose of the Study:
- To analyze clinical presentations, histological findings, and treatment outcomes of inverted papillomas of the urinary bladder.
- To evaluate the efficacy of transurethral resection for these tumors.
Main Methods:
- Retrospective review of eight cases of inverted papilloma of the urinary bladder diagnosed between November 1990 and May 1994.
- Analysis of patient demographics, clinical symptoms, tumor characteristics, treatment modalities, and follow-up data.
Main Results:
- Seven males and one female, with an average age of 63.5 years, were diagnosed.
- Common presentations included hematuria and obstructive symptoms.
- Most tumors were solitary, pedunculated, and located in the bladder neck or trigonal area. One case coexisted with transitional cell carcinoma.
- Transurethral resection was successful in seven patients with no recurrence at a median follow-up of 18 months. Three tumors (37.5%) contained calcium oxalate crystals.
Conclusions:
- Inverted papillomas of the urinary bladder are benign and successfully treated with transurethral resection and fulguration.
- Preoperative evaluation is crucial to rule out concurrent malignancy.
- Annual cystourethroscopic follow-up is mandatory for all patients.