RT Journal Article T1 Prognostic and Clinicopathological Significance of FADD Upregulation in Head and Neck Squamous Cell Carcinoma: A Systematic Review and Meta-Analysis A1 González-Moles, Miguel Ángel A1 Ayén, Ángela A1 González-Ruiz, Isábel A1 de Porras-Carrique, Teresa A1 González-Ruiz, Lucía A1 Ruiz-Ávila, Isábel A1 Ramos-García, Pablo K1 FADD K1 Fas-associated death domain K1 Head and neck squamous cell carcinoma K1 Oral squamous cell carcinoma K1 Laryngeal squamous cell carcinoma K1 Prognosis K1 Biomarker K1 Systematic review K1 Meta-analysis K1 Proteína de dominio de muerte asociada a Fas K1 Carcinoma de células escamosas de cabeza y cuello K1 Pronóstico K1 Biomarcadores K1 Revisión sistemática K1 Metaanálisis AB Fas-associated death domain (FADD) upregulation, i.e., gene amplification, protein phosphorylation and/or overexpression, has shown promising prognostic implications in head and neck squamous cell carcinoma (HNSCC). This systematic review and meta-analysis aims to evaluate the clinicopathological and prognostic significance of FADD upregulation in HNSCC. We searched studies published before February 2020 through PubMed, Embase, Web of Science, Scopus and Google Scholar. We evaluated the quality of the studies included using the QUIPS tool. The impact of FADD upregulation on survival and clinicopathological variables was meta-analysed. We explored heterogeneity and their sources, conducted sensitivity analyses and investigated small-study effects. Thirteen studies (1,923 patients) met inclusion criteria. FADD immunohistochemical overexpression was statistically associated with worse overall survival (hazard ratio [HR] = 1.52, 95% confidence intervals [CI] = 1.28-1.81, p < 0.001), disease-specific survival (HR = 2.52, 95% CI = 1.61-3.96, p < 0.001), disease-free survival (HR = 1.67, 95% CI=1.29-2.15, p < 0.001), higher clinical stage (odds ratio [OR] = 1.72, 95% CI = 1.17-2.51, p = 0.005) and a large magnitude of effect with N+ status (OR = 2.36, 95% CI = 1.85-3.00, p < 0.001). FADD phosphorylation in ser-194 demonstrated no prognostic value, while no conclusive results can be drawn for FADD gene amplification. In conclusion, our findings indicate that immunohistochemical assessment of FADD overexpression could be incorporated into the prognostic evaluation of HNSCC. PB MDPI YR 2020 FD 2020-08-24 LK http://hdl.handle.net/10668/3604 UL http://hdl.handle.net/10668/3604 LA en NO González-Moles MA, Ayén A, González-Ruiz I, de Porras-Carrique T, González-Ruiz L, Ruiz-Ávila I, et al. Prognostic and Clinicopathological Significance of FADD Upregulation in Head and Neck Squamous Cell Carcinoma: A Systematic Review and Meta-Analysis. Cancers. 2020 Aug 24;12(9):2393 DS RISalud RD Apr 9, 2025