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Primary carcinoid tumor of the urinary bladder
Ayako Sugihara1, Keisuke Kajio, Tetsuro Yoshimoto
1Department of Pathology, Hyogo College of Medicine, Nishinomiya, Japan. sugihara@hyo-med.ac.jp
International Urology and Nephrology
|July 2, 2002
Summary
A rare carcinoid tumor was found in a 73-year-old man's urinary bladder. This primary bladder carcinoid tumor was successfully resected and showed no recurrence after 22 months.
Area of Science:
- Urology
- Oncology
- Pathology
Background:
- Urinary bladder tumors are uncommon, with carcinoid tumors being exceptionally rare.
- Primary carcinoid tumors of the bladder are a distinct subtype of neuroendocrine neoplasms.
Observation:
- A 1.0 cm polyp was incidentally discovered on the posterior wall of the urinary bladder during cystoscopy.
- The polyp was resected via a transurethral approach and monitored for recurrence.
Findings:
- Histopathological examination revealed a tumor with trabecular or tubular patterns.
- Tumor cells exhibited positive staining for chromogranin-A and Grimelius stain, confirming a carcinoid tumor.
- The absence of tumors in other organs confirmed its primary origin within the urinary bladder.
Implications:
- This case highlights the importance of considering rare neuroendocrine tumors in bladder pathology.
- Successful transurethral resection suggests a potentially favorable prognosis for localized primary bladder carcinoid tumors.
- Further research is warranted to understand the pathogenesis and optimal management of this rare entity.