Data documento
02/05/2024

Título
EGFR Mutations and PD-L1 Expression in Early-Stage Non-Small Cell Lung Cancer: A Real-World Data From a Single Center in Brazil

Autor(es)
Alves Pinto I, - de Oliveira Cavagna R, - Virginio da Silva AL, - Dias JM, - Santana IV, - Souza LC, - Ferreira da Silva FA, - Biazotto Fernandes MF, - Junqueira Pinto GD, - Negreiros IS, - Santiago Gonçalves MF, - de Paula FE, - Berardinelli GN, - Casagrande GMS, - Oliveira da Silva M, - Albino da Silva EC, - de Oliveira MA, - Jacinto AA, - Duval da Silva V, - Reis RM, - De Marchi P, - Leal LF.

Resumo
Background: Targeted and immunotherapies are currently moving toward early-stage settings for patients with non-small cell lung cancer (NSCLC). Predictive biomarkers data are scarce in this scenario. We aimed to describe the frequency of EGFR mutations and PD-L1 expression levels in early-stage non-squamous patients with NSCLC from a large, single Brazilian oncology center. Methods: We retrospectively evaluated patients with NSCLC diagnosed at an early-stage (IB to IIIA-AJCC seventh edition) at Barretos Cancer Hospital (n = 302). EGFR mutational status was assessed in FFPE tumor tissues using distinct methodologies (NGS, Cobas, or Sanger sequencing). PD-L1 expression was evaluated by immunohistochemistry (clone 22C3) and reported as Tumor Proportion Score (TPS), categorized as <1%, 1-49%, and ≥50%. We evaluated the association between EGFR mutational status and PD-L1 expression with sociodemographic and clinicopathological parameters by Fisher’s test, qui-square test, and logistic regression. Survival analysis was assessed by the Kaplan-Meier method and Cox regression model. Results: EGFR mutations were detected in 17.3% (n = 48) of cases and were associated with female sex, never smokers, and longer overall and event-free survival. PD-L1 positivity was observed in 36.7% (n = 69) of cases [TPS 1-49% n = 44(23.4%); TPS ≥50% n = 25(13.3%)]. PD-L1 positivity was associated with smoking, weight loss, and higher disease stages (IIB/IIIA). Conclusion: The frequencies of EGFR mutations and PD-L1 positivity were described for early-stage non-squamous patients with NSCLC. These results will be essential for guiding treatment strategies with the recent approvals of osimertinib and immunotherapy in the adjuvant setting.

Citação
Alves Pinto I, de Oliveira Cavagna R, Virginio da Silva AL, Dias JM, Santana IV, Souza LC, Ferreira da Silva FA, Biazotto Fernandes MF, Junqueira Pinto GD, Negreiros IS, Santiago Gonçalves MF, de Paula FE, Berardinelli GN, Casagrande GMS, Oliveira da Silva M, Albino da Silva EC, de Oliveira MA, Jacinto AA, Duval da Silva V, Reis RM, De Marchi P, Leal LF. EGFR Mutations and PD-L1 Expression in Early-Stage Non-Small Cell Lung Cancer: A Real-World Data From a Single Center in Brazil. Oncologist. 2022 Nov 3;27(11):e899-e907. doi: 10.1093/oncolo/oyac167. PMID: 36099421; PMCID: PMC9632322.

Data documento
02/05/2024

Título
High frequency of WNT-activated medulloblastomas with CTNNB1 wild type suggests a higher proportion of hereditary cases in a Latin-Iberian population

Autor(es)
Moreno DA - Bonatelli M - Antoniazzi AP - de Paula FE - Leal LF - Garcia FAO - de Paula AE - Teixeira GR - Santana IVV - Saggioro F - Neder L - Valera ET - Scrideli CA - Stavale J - Malheiros SMF - Lima M - Hajj GNM - Garcia-Rivello H - Christiansen S - Nunes S - Gil-da-Costa MJ - Pinheiro J - Martins FD - Junior CA - Mançano BM - Reis RM.

Resumo
Medulloblastomas are the most common primary malignant brain tumors in children. They are divided into molecular subgroups: WNT-activated, SHH-Activated, TP53 mutant or wild type, and non-WNT/non-SHH (Groups 3 and 4). WNT-activated medulloblastomas are usually caused by mutations in the CTNNB1 gene (85%–90%), and most remaining cases of CTNNB1 wild type are thought to be caused by germline mutations in APC. So far, the frequencies of CTNNB1 have been reported mainly in North American and European populations. The aim of this study was to report the frequency of CTNNB1 mutations in WNT-activated medulloblastomas in a Latin-Iberian population and correlate with their clinicopathological characteristics.

Citação
Moreno DA, Bonatelli M, Antoniazzi AP, de Paula FE, Leal LF, Garcia FAO, de Paula AE, Teixeira GR, Santana IVV, Saggioro F, Neder L, Valera ET, Scrideli CA, Stavale J, Malheiros SMF, Lima M, Hajj GNM, Garcia-Rivello H, Christiansen S, Nunes S, Gil-da-Costa MJ, Pinheiro J, Martins FD, Junior CA, Mançano BM, Reis RM. High frequency of WNT-activated medulloblastomas with CTNNB1 wild type suggests a higher proportion of hereditary cases in a Latin-Iberian population. Front Oncol. 2023 Sep 4;13:1237170. doi: 10.3389/fonc.2023.1237170. PMID: 37746264; PMCID: PMC10513896.