PURPOSE: To determine the frequency and the prognostic value of fibroblast growth factor receptor 3 (FGFR3) mutations in patients with nonmuscle invasive bladder tumors according to tumor stage and grade. PATIENTS AND METHODS: Seven hundred seventy-two patients with newly diagnosed bladder tumors were recruited. Tumors were reviewed by expert pathologists. Patients were prospectively followed-up (median, 62.6 months for disease-free patients) through review of hospital records and telephone interviews. The sequence of exons 7 and 10 of FGFR3 was analyzed by polymerase chain reaction and direct sequencing. We assessed the association of mutations with stage and grade. The predictive value of mutations for recurrence, progression, and mortality were assessed using Kaplan-Meier and Cox multivariable models. RESULTS: Mutations were more common among low malignant potential neoplasms (LMPN; 77%) and TaG1/TaG2 tumors (61%/58%) than among TaG3 tumors (34%) and T1G3 tumors (17%). The S249C, Y375C, S248C, and G372C mutations accounted for 91.5% of all sequence changes. The A393E substitution was associated with LMPN (P < .001). The F386L polymorphism was more frequent among patients with low-grade tumors (odds ratio, 6.97; 95%CI, 1.40 to 47.06; P = .009). In the multivariable analysis of all superficial tumors, mutations were associated with increased risk of recurrence. However, in the stratified analyses only patients with TaG1 tumors had a significantly higher risk of recurrence (hazard ratio, 2.12; 95%CI, 1.28 to 3.53; P = .004). CONCLUSION: The findings of this large study strongly support the notion that FGFR3 mutations characterize a subgroup of bladder cancers with good prognosis; patients with mutant TaG1 tumors have a higher risk of recurrence; and the F386L variant is selectively associated with low-grade tumors.
PURPOSE: To determine the frequency and the prognostic value of fibroblast growth factor receptor 3 (FGFR3) mutations in patients with nonmuscle invasive bladder tumors according to tumor stage and grade. PATIENTS AND METHODS: Seven hundred seventy-two patients with newly diagnosed bladder tumors were recruited. Tumors were reviewed by expert pathologists. Patients were prospectively followed-up (median, 62.6 months for disease-free patients) through review of hospital records and telephone interviews. The sequence of exons 7 and 10 of FGFR3 was analyzed by polymerase chain reaction and direct sequencing. We assessed the association of mutations with stage and grade. The predictive value of mutations for recurrence, progression, and mortality were assessed using Kaplan-Meier and Cox multivariable models. RESULTS: Mutations were more common among low malignant potential neoplasms (LMPN; 77%) and TaG1/TaG2 tumors (61%/58%) than among TaG3 tumors (34%) and T1G3 tumors (17%). The S249C, Y375C, S248C, and G372C mutations accounted for 91.5% of all sequence changes. The A393E substitution was associated with LMPN (P < .001). The F386L polymorphism was more frequent among patients with low-grade tumors (odds ratio, 6.97; 95%CI, 1.40 to 47.06; P = .009). In the multivariable analysis of all superficial tumors, mutations were associated with increased risk of recurrence. However, in the stratified analyses only patients with TaG1 tumors had a significantly higher risk of recurrence (hazard ratio, 2.12; 95%CI, 1.28 to 3.53; P = .004). CONCLUSION: The findings of this large study strongly support the notion that FGFR3 mutations characterize a subgroup of bladder cancers with good prognosis; patients with mutant TaG1 tumors have a higher risk of recurrence; and the F386L variant is selectively associated with low-grade tumors.
Authors: Christian Hafner; Agustí Toll; Alejandro Fernández-Casado; Julie Earl; Miriam Marqués; Francesco Acquadro; Marinela Méndez-Pertuz; Miguel Urioste; Núria Malats; Julie E Burns; Margaret A Knowles; Juan C Cigudosa; Arndt Hartmann; Thomas Vogt; Michael Landthaler; Ramón M Pujol; Francisco X Real Journal: Proc Natl Acad Sci U S A Date: 2010-11-15 Impact factor: 11.205
Authors: Christian Hafner; Elena López-Knowles; Nuno M Luis; Agustí Toll; Eulàlia Baselga; Alex Fernández-Casado; Silvia Hernández; Adriana Ribé; Thomas Mentzel; Robert Stoehr; Ferdinand Hofstaedter; Michael Landthaler; Thomas Vogt; Ramòn M Pujol; Arndt Hartmann; Francisco X Real Journal: Proc Natl Acad Sci U S A Date: 2007-08-02 Impact factor: 11.205
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Authors: Lambertus A Kiemeney; Patrick Sulem; Soren Besenbacher; Sita H Vermeulen; Asgeir Sigurdsson; Gudmar Thorleifsson; Daniel F Gudbjartsson; Simon N Stacey; Julius Gudmundsson; Carlo Zanon; Jelena Kostic; Gisli Masson; Hjordis Bjarnason; Stefan T Palsson; Oskar B Skarphedinsson; Sigurjon A Gudjonsson; J Alfred Witjes; Anne J Grotenhuis; Gerald W Verhaegh; D Timothy Bishop; Sei Chung Sak; Ananya Choudhury; Faye Elliott; Jennifer H Barrett; Carolyn D Hurst; Petra J de Verdier; Charlotta Ryk; Peter Rudnai; Eugene Gurzau; Kvetoslava Koppova; Paolo Vineis; Silvia Polidoro; Simonetta Guarrera; Carlotta Sacerdote; Marcello Campagna; Donatella Placidi; Cecilia Arici; Maurice P Zeegers; Eliane Kellen; Berta Saez Gutierrez; José I Sanz-Velez; Manuel Sanchez-Zalabardo; Gabriel Valdivia; Maria D Garcia-Prats; Jan G Hengstler; Meinolf Blaszkewicz; Holger Dietrich; Roel A Ophoff; Leonard H van den Berg; Kristin Alexiusdottir; Kristleifur Kristjansson; Gudmundur Geirsson; Sigfus Nikulasson; Vigdis Petursdottir; Augustine Kong; Thorgeir Thorgeirsson; N Aydin Mungan; Annika Lindblom; Michael A van Es; Stefano Porru; Frank Buntinx; Klaus Golka; José I Mayordomo; Rajiv Kumar; Giuseppe Matullo; Gunnar Steineck; Anne E Kiltie; Katja K H Aben; Eirikur Jonsson; Unnur Thorsteinsdottir; Margaret A Knowles; Thorunn Rafnar; Kari Stefansson Journal: Nat Genet Date: 2010-03-28 Impact factor: 38.330