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Inverted papillary carcinoma of the urinary bladder
K Kawabe1, K Fukutani, N Mikata
1Department of Urology, Branch Hospital, Faculty of Medicine, University of Tokyo, Japan.
Japanese Journal of Clinical Oncology
|December 1, 1987
Summary
Inverted papillary carcinoma of the urinary bladder, typically considered benign, showed malignant changes. Careful pathologic examination is crucial for inverted bladder tumors.
Area of Science:
- Urologic Oncology
- Pathology
Background:
- Inverted papilloma of the urinary bladder is generally regarded as a benign neoplastic condition.
- This case challenges the conventional understanding of inverted papilloma's typical behavior.
Observation:
- A 47-year-old male presented with a 2 cm bladder mass near the right ureteral orifice.
- Cystoscopy showed a smooth, stalked lesion consistent with inverted papilloma.
- Transurethral resection was performed for the bladder tumor.
Findings:
- Histopathological examination of the resected specimen revealed malignant changes within the epithelial cords.
- This finding contrasts with the generally accepted benign nature of inverted papillomas.
- The tumor exhibited characteristics of inverted papillary carcinoma.
Implications:
- The study underscores the necessity for thorough pathological evaluation of all inverted-type urinary tract tumors.
- Accurate diagnosis is critical, as some cases may exhibit malignant potential.
- This highlights the importance of vigilance in urologic pathology to avoid misclassification and ensure appropriate patient management.