Abstract
Objectives: To describe clinical, imaging, and histopathological characteristics of inflammatory myofibroblastic tumour (IMT) of the urinary bladder and provide initial management and surveillance recommendations. Patients and Methods: We identified patients with IMT of the bladder treated at our facility from 1998 to 2020. Categorical variables were analysed with chi-square and Fisher’s exact tests and continuous variables with the Mann–Whitney U-test. Kaplan–Meier analysis was performed for recurrence-free survival. Results: IMT was diagnosed in 35 patients with median (interquartile range [IQR]) follow-up of 20 (11.5–68.5) months. At initial diagnosis 86% were clinically organ-confined, 9% locally advanced, and 5% metastatic. Majority of patients (92%) had residual disease on re-staging transurethral resection (TUR). Of the 15 patients with organ-confined disease managed initially with TUR alone, five (33%) recurred at a median (IQR) of 5 (3.0–5.5) months from initial diagnosis. Presentation with visible haematuria was associated with recurrence (100% in recurrence vs 40% in non-recurrence groups, P = 0.044). There were no patients who developed a recurrence beyond 6 months after diagnosis. Partial or radical cystectomy was required in 23% and 9% of patients, respectively. One patient presented with metastatic disease associated with anaplastic lymphoma kinase (ALK) translocation and achieved a durable complete remission with 7 months of crizotinib therapy. Conclusions: No patient with IMT treated with aggressive endoscopic management developed recurrences beyond 6 months. There were additionally no recurrences noted after definitive radical or partial cystectomy. These data support organ sparing therapy with aggressive endoscopic management and short-term surveillance in patients with localised IMT, with extirpative surgery reserved for refractory cases.
Original language | English (US) |
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Pages (from-to) | 604-610 |
Number of pages | 7 |
Journal | BJU international |
Volume | 130 |
Issue number | 5 |
DOIs | |
State | Published - Nov 2022 |
Keywords
- anaplastic lymphoma kinase
- crizotinib
- inflammatory myofibroblastic tumour
- radical cystectomy
- transurethral resection
ASJC Scopus subject areas
- Urology