Cited by 88Bladder and Urothelial Cancer TreatmentsFibroblast Growth Factor ResearchCancer Genomics and Diagnostics

Somatic mutation of fibroblast growth factor receptor‐3 ( FGFR3 ) defines a distinct morphological subtype of high‐grade urothelial carcinoma

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Al‐Ahmadie, Hikmat A, Iyer, Gopa, Janakiraman, Manickam, Lin, Oscar, Heguy, Adriana, Tickoo, Satish K., Fine, Samson W., Gopalan, Anuradha +9 more·2011·The Journal of Pathology

Abstract

FGFR3 mutations are common in low‐grade urothelial carcinoma and represent a potential therapeutic target in this disease. Their incidence and functional role in high‐grade urothelial carcinoma (HGUC), which displays an increased propensity for recurrence and muscularis propria invasion, is less well defined. We developed a mass spectrometry‐based genotyping assay to define the incidence of FGFR3 mutations in a large clinically annotated set of urothelial carcinomas. FGFR3 mutations were found in 17% of HGUC versus 84% of low‐grade lesions. Retrospective pathological review of the class of FGFR3 mutant HGUC revealed unique histological features, characterized by a bulky, exophytic component with branching papillary architecture as well as irregular nuclei with a koilocytoid appearance. The predictive value of this histological appearance was confirmed using a prospective set of 49 additional HGUCs. Prospective histological review was able to correctly predict for the presence of an FGFR3 mutation in 13/24 HGUC specimens that exhibited the distinct morphology (54%). All 25 specimens lacking the defined histological features were FGFR3 wild‐type for a negative predictive value of 100%. Macrodissection of individual tumours confirmed the presence of the FGFR3 mutant allele in non‐invasive and invasive, low and high‐grade regions of individual tumours and in the lymph node metastases of patients whose tumours possessed the characteristic morphological signature, suggesting that FGFR3 mutations are not restricted to the more clinically indolent regions of HGUCs. These data suggest that histological screening of HGUCs followed by confirmatory genotyping can be used to enrich for the population of HGUCs most likely to harbour activating mutations in the FGFR‐3 receptor tyrosine kinase. Histological review could thus aid in the development of targeted inhibitors of FGFR‐3 by facilitating the identification of the subset of patients most likely to harbour activating mutations in the FGFR3 gene. Copyright © 2011 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.

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Authors
Al‐Ahmadie, H. A., Iyer, G., Janakiraman, M., Lin, O., Heguy, A., Tickoo, S. K., Fine, S. W., Gopalan, A., Chen, Y., Balar, A., Riches, J., Bochner, B., Dalbagni, G., Bajorin, D. F., Reuter, V. E., Milowsky, M. I., & Solit, D. B.
Affiliations
Memorial Sloan Kettering Cancer Center (US)
Corresponding author
Solit, David B.
Venue
The Journal of Pathology
Publisher
Wiley
Published
2011-05-05
Volume
224
Issue
2
Pages
270-279
ISSN
  • 0022-3417 (ISSN-L)
  • 1096-9896
OpenAlex
W1982643760
Cited by
88
References
40
Citations by year
2026: 2 · 2025: 4 · 2024: 4 · 2023: 3 · 2022: 6 · 2021: 5 · 2020: 4 · 2019: 5 · 2018: 4 · 2017: 2 · 2016: 5 · 2015: 11 · 2014: 13 · 2013: 10 · 2012: 9
FWCI
10.49
Type
journal article
Language
en
Open access
Locations
  • The Journal of Pathology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
American Association for Cancer Research-Henry Shepard Bladder Cancer Research Fund
Topics
  • Health Sciences › Medicine › Surgery › Bladder and Urothelial Cancer Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fibroblast Growth Factor Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
Keywords
FGFR3 mutation, high-grade urothelial carcinoma, somatic mutations, histological subtypes, targeted therapy, lymph node metastasis, tumor heterogeneity
MeSH terms
Aged, Aged, 80 and over, Urinary Bladder Neoplasms, Female, Humans, Lymphatic Metastasis, Male, Middle Aged, Mutation, Neoplasm Invasiveness, Neoplasm Proteins, Prognosis, Retrospective Studies, Survival Analysis, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Receptor, Fibroblast Growth Factor, Type 3

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