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Diagnostic Pathology

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Open Access 01-12-2024 | Case Report

Giant cell-rich solitary fibrous tumour of the urinary bladder: case report of an unusual histological variant and literature review

Authors: Zhou Su, Jianguo Wei, Xiaolu Yuan

Published in: Diagnostic Pathology | Issue 1/2024

Abstract

Background

Giant cell-rich solitary fibrous tumour (GCR-SFT), previously referred to as giant cell angiofibroma, is an uncommon soft tissue tumour that classically occurs in the orbit but very rarely presents in deep organs. Here, we present a case of GCR-SFT occurring in the urinary bladder, which is one of the unusual histological subtypes of SFT.

Case presentation

A 56-year-old man was incidentally found to have a mass measuring 4.5 × 4.3 × 4.0 cm located in the left posterior wall of the bladder by computed tomography during a physical examination. The lesion was confirmed as GCR-SFT by pathological examination after laparoscopic radical surgery. Histopathologically, the tumour was a well-circumscribed, nonencapsulated lesion that was composed of bland spindle-ovoid tumour cells alternating with hypocellular and hypercellular areas, staghorn-like vasculatures and scattered large dark-stained multinucleate giant cells lining pseudovascular spaces. The spindle-ovoid cells and multinucleate giant cells showed strong and diffuse expression of CD34 and nuclear STAT6. In addition, the hallmark of the NAB2ex4-STAT6ex5 fusion gene was detected by RT‒PCR. The patient was classified as having a low risk of recurrence or metastasis according to the risk stratification criteria. The patient underwent regular follow-up for 34 months after surgery, and there was no evidence of local recurrence or metastasis.

Conclusion

This is the first reported case of GCR-SFT occurring in the urinary bladder with underlying NAB2ex4-STAT6ex5 fusion. Complete surgical excision of the tumour and long-term follow-up are recommended to ensure no local recurrence or metastasis.

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Title: Giant cell-rich solitary fibrous tumour of the urinary bladder: case report of an unusual histological variant and literature review
Authors: Zhou Su
Jianguo Wei
Xiaolu Yuan
Publication date: 01-12-2024
Publisher: BioMed Central
Published in: Diagnostic Pathology / Issue 1/2024
Electronic ISSN: 1746-1596
DOI: https://doi.org/10.1186/s13000-024-01442-z

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Giant cell-rich solitary fibrous tumour of the urinary bladder: case report of an unusual histological variant and literature review

Abstract

Background

Case presentation

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Case presentation

Conclusion

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