Isolated schwannoma of the urinary bladder: a case report and review of the literature

Nasrollahi, Hamid; Ariafar, Ali; Ahmed, Faisal; Mokhtari, Maral; Eslahi, Ali; Ansari, Mansour; Chowdhury, Umayir

doi:10.11604/pamj.2020.35.108.17745

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…Surgical resection is the main method of treatment. The methods include partial cystectomy [ 4 , 7 – 9 , 12 ] and TURBT [ 3 , 10 , 11 , 17 , 18 ]. All of the cases reported for partial cystectomy are open, except for a case report of laparoscopic partial cystectomy [ 13 ].…”

Section: Discussionmentioning

confidence: 99%

Laparoscopic partial cystectomy through extraperitoneal space for primary bladder schwannoma

Liu

2022

Eur J Med Res

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Background Schwannomas can occur in the body where nerve sheaths are present. Genitourinary schwannomas are very rare, especially primary bladder schwannomas. They account for only 0.1% of bladder tumours. The literature reports that simple surgical resection has a good effect and prognosis. Case presentation A 39-year-old man had no significant improvement in symptoms due to frequent urination and urgency for 1 month following the treatment of prostatitis for 2 weeks. Ultrasound and computed tomography (CT) showed a mass in the left side wall of the bladder (size approximately 2.0 × 1.9 cm) that had clear boundaries and protruded outward from the bladder. After the extraperitoneal space was dilated with a balloon, a minimally invasive laparoscopic partial cystectomy was performed in this space to remove the tumour. The pathological diagnosis was bladder schwannoma. Immunohistochemical staining showed that it was strongly S100 protein positive. There was no recurrence after 2 years follow-up by cystoscopy and CT. Conclusions Bladder schwannomas are clinically rare benign bladder lesions and no specific clinical manifestations. Laparoscopic partial cystectomy through the extraperitoneal space is a safe and feasible treatment option.

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Section: Discussionmentioning

confidence: 99%

Laparoscopic partial cystectomy through extraperitoneal space for primary bladder schwannoma

Liu

2022

Eur J Med Res

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“…In addition, radiotherapy can also be used as an attempt ( 10 , 12 ). It has been reported that chemotherapy is invalid to extracranial schwannoma ( 9 ). However, a patient in France received TURBT plus Botulinum toxin (botox).…”

Section: Discussion and Review Of The Literaturementioning

confidence: 99%

Primary bladder schwannoma: a case report and literature review

Xu¹,

Liu²,

Kong³

et al. 2021

Transl Cancer Res TCR

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Primary bladder schwannoma is an extremely rare bladder tumor that originates from Schwann cells in the nerve sheath and often associated with von Reichnhausen's disease. Isolated cases of urinary bladder schwannoma are incredibly rare with no more than 1/1,000 of bladder tumours. We report a 33-year-old female patient who did not have any symptoms and was found by computed tomography (CT). Preoperative cystoscopy revealed a large sessile and smooth-surfaced mass on the anterior top of the bladder. Then she was successfully managed by partial cystectomy. Hematoxylin-eosin (HE) staining and immunohistochemistry (IHC) confirmed the mass was schwannoma. She was discharged 16 days after admission. In addition, she was followed up without intravesical recurrence or metastases for 29 months. Subsequently, literatures in PubMed (https://pubmed.ncbi.nlm.nih.gov/) accessed to bladder schwannoma since 1993 are searched and reviewed, more clinical data are provided to better assist in the diagnosis and treatment. In summary, bladder schwannoma is a rare benign tumor of the urinary system. Imaging examination and cystoscopy have a hint on the disease to a certain extent. The first choice of treatment is surgical resection, pathology is the gold standard and S-100 is usually positive. On account of the possibility of malignant transformation of the disease, Long-term follow-up is necessary.

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“…Vertebral schwannoma is the most described neurilemoma in literature, of which the overall annual incidence in the Asian population is in the range of 1.74–3.72 per 100,000 persons (4), and the highest incidence rate is observed in the age group of 60–69 years (4,5). Other locations are less common and include mainly the head, neck, and limbs (3), with the rare cases of the esophagus (6), colon and rectum (7), or urinary bladder (8).…”

Section: Introductionmentioning

confidence: 99%

Diagnostic accuracy of multiparametric ultrasound for peripheral nerve schwannoma

et al. 2022

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Background Ultrasound (US) diagnostic techniques have the advantages of low cost, convenient operation, and high availability. Purpose To explore the diagnostic accuracy of multiparametric US in evaluating signs of peripheral schwannoma. Material and Methods This retrospective case-control study included patients with soft-tissue masses on the limbs (divided into the schwannoma and non-schwannoma groups) between January 2017 and November 2020. US features were compared between the two groups, and receiver operating characteristics analysis was used to evaluate the diagnostic efficacy of these features. Results A total of 165 patients were included in this study; of them, 63 (38.2%) were diagnosed with schwannoma. Regular morphology (95.2% vs. 39.2%), cystic degeneration (71.4% vs. 27.5%), target sign on elastography (82.5% vs. 0), and polar blood supply sign (87.3% vs. 14.7%) were more common in schwannomas than in non-schwannoma lesions (all P < 0.001). Combining the four signs for diagnosis of schwannomas, the sensitivity, specificity, and accuracy were 95.24%, 96.08%, and 95.76%, respectively, with an area under the curve (AUC) of 0.987 (95% confidence interval = 0.955–0.998). Entering and exiting nerve sign was observed in 87.3% of schwannomas and in 3.0% of non-schwannoma lesions ( P < 0.001), while split-fat sign was similar between the two groups (9.5% vs. 2.0%; P = 0.068). Conclusion Polar blood supply sign and target sign on elastography are specific US signs in peripheral schwannomas. The combination of two-dimensional imaging, color flow imaging, and elastography can achieve an excellent diagnostic accuracy in schwannomas.

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Isolated schwannoma of the urinary bladder: a case report and review of the literature

Cited by 3 publications

References 10 publications

Laparoscopic partial cystectomy through extraperitoneal space for primary bladder schwannoma

Laparoscopic partial cystectomy through extraperitoneal space for primary bladder schwannoma

Primary bladder schwannoma: a case report and literature review

Diagnostic accuracy of multiparametric ultrasound for peripheral nerve schwannoma

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