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Case Reports in Surgery
Volume 2015, Article ID 510508, 4 pages
Case Report

Embryonal Rhabdomyosarcoma of the Adult Urinary Bladder: A Rare Case Report of Misclassification as Inflammatory Myofibroblastic Tumor

1Department of Urology, National University Health System, 1E Kent Ridge Road, Singapore 119228
2Department of Pathology, National University Health System, 1E Kent Ridge Road, Singapore 119228

Received 7 December 2014; Accepted 26 January 2015

Academic Editor: Makoto Ohori

Copyright © 2015 Kelven Weijing Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Embryonal rhabdomyosarcoma (ERMS) of the adult urinary bladder is a rare malignant tumour. Inflammatory myofibroblastic tumour (IMT) of the bladder is a benign genitourinary tumour that may appear variable histologically but usually lacks unequivocal malignant traits. Techniques like flow cytometry and immunohistochemistry may be used to differentiate these two tumours. Our patient, a 46-year-old male, had rapidly recurring lower urinary tract symptoms after two transurethral resections of the prostate. He subsequently underwent a transvesical prostatectomy which showed IMT on histology. However, his symptoms did not resolve and an open resection done at our institution revealed a 6 cm tumour arising from the right bladder neck. This time, histology was ERMS with diffuse anaplasia of the bladder. Rapid recurrence of urinary symptoms with prostate regrowth after surgery is unusual. Differential diagnoses of uncommon bladder malignancies should be considered if there is an inconsistent clinical course as treatment approaches are different.