Non-functional paraganglioma of urinary bladder managed by transurethral resection

Vol. 45 (x): 2019 April 4.[Ahead of print]

doi: 10.1590/S1677-5538.IBJU.2018.0604


ORIGINAL ARTICLE

Baochao Zhang 1, Zhenrui Fu 1, Liwei Liu 1, Baomin Qiao 1, Chunyu Liu 1
1 Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, China

ABSTRACT

Purpose: As a rare bladder tumor, paraganglioma of the urinary bladder (PUB) is frequently misdiagnosed as bladder cancer, particularly for the non-functional type. To date, transurethral resection remains a controversial treatment for non-functional PUB.

This study aimed to identify the clinical features, pathological characteristics, prognosis, and safe/effective treatment of non-functional PUB using transurethral resection of the bladder tumor (TURBT).

Materials and Methods: The clinical records, radiological data, pathological characteristics and follow-up times were retrospectively reviewed in 10 patients with clinically and pathologically proven non-functional PUB in our hospital from January 2008 to November 2016. All patients underwent TURBT treatment.

Results: The incidence of non-functional PUB in patients with bladder cancer was 0.17%. The mean age at diagnosis was 44.5 ± 13.6 years (range, 29-70 years), and the patient population had a female: male ratio of 3: 2. No patients had excess catecholamine (CA) whilst four patients had painless hematuria. All neoplasms were completely resected via TURBT. The majority of samples were positive for immunohistochemical markers including chromogranin A (CgA) and Synaptophysin (Syn), but were negative for cytokeratins (CKs). Only a single recurrence was observed from the mean follow-up

period of 36.4 ± 24.8 months.

Conclusion: Complete TURBT is a safe and effi cient treatment that serves both diagnostic and therapeutic purposes. Histopathological and immunohistochemistry examinations are mandatory for diagnostic confi rmation. Long-term follow-up is recommended for patients with non-functional PUB.

Keywords: Paraganglioma; Urinary Bladder; Transurethral Resection of Prostate

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