RESUMO
BACKGROUND: Interval debulking surgery (IDS) is an option for treating patients with advanced ovarian carcinoma. Two randomized trials have shown similar survival rates for primary debulking surgery (PDS) and IDS. One of the concerns with IDS is the potentially higher risk of inducing platinum resistance when treating patients with greater disease volume. METHODS: A retrospective review of data on 237 patients with stage IIIC and IV ovarian carcinoma who were treated at a single institution from 2000 to 2013. We analyzed the association of IDS with time to first platinum resistant relapse (TTPR); platinum-resistant disease at first relapse, defined as a platinum-free interval (PFI) after first-line chemotherapy of <6 months; and overall response rate (ORR) to chemotherapy at first platinum-sensitive relapse. RESULTS: The TTPR was 60 months, and the median TTPR was longer for the PDS (80.8 months) versus IDS group (39.3 months; p = 0.012) and for patients with residual disease (RD) ≤10 mm (80.8 months) compared with those with RD >10 mm (26.1 months; p < 0.001). In the multivariate analysis, IDS [hazard ratio (HR) 1.92; p = 0.009] and RD >10 mm (HR 1.65; p < 0.001) retained an increased risk of developing platinum-resistant disease. IDS was not associated with a greater risk of PFI <6 months at first relapse, and the ORR to platinum-based chemotherapy at first platinum-sensitive relapse was 87.2 % for patients who were treated with PDS compared with 68.0 % for those who underwent IDS (p = 0.051). CONCLUSIONS: IDS correlates with a higher risk of the development of platinum resistance.
Assuntos
Procedimentos Cirúrgicos de Citorredução , Resistencia a Medicamentos Antineoplásicos , Recidiva Local de Neoplasia/patologia , Neoplasia Residual/patologia , Neoplasias Ovarianas/patologia , Platina/uso terapêutico , Adenocarcinoma de Células Claras/patologia , Adenocarcinoma de Células Claras/terapia , Adenocarcinoma Mucinoso/patologia , Adenocarcinoma Mucinoso/terapia , Quimioterapia Adjuvante , Terapia Combinada , Cistadenocarcinoma Seroso/patologia , Cistadenocarcinoma Seroso/terapia , Neoplasias do Endométrio/patologia , Neoplasias do Endométrio/terapia , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Terapia Neoadjuvante , Gradação de Tumores , Invasividade Neoplásica , Recidiva Local de Neoplasia/terapia , Estadiamento de Neoplasias , Neoplasia Residual/terapia , Neoplasias Ovarianas/terapia , Prognóstico , Estudos Retrospectivos , Fatores de Risco , Taxa de SobrevidaRESUMO
BACKGROUND: Platinum-based chemotherapy associated with cetuximab is the first-line treatment for inoperable recurrence or metastatic head and neck squamous cell carcinoma (HNSCC). There is no established biomarker for cetuximab efficacy in HNSCC. The PI3K pathway is one of the most frequently altered pathways in HNSCC. Loss of phosphatase and tensin homolog (PTEN) expression occurs in up to 30 % of cases. METHODS: This was a retrospective analysis of data from 61 patients with inoperable recurrence or metastatic HNSCC treated with cetuximab. PTEN, epidermal growth factor receptor and p16 expression were analyzed by immunohistochemistry and tested for association with clinical outcomes. RESULTS: Median overall survival was 11.4 months and progression-free survival was 6.9 months. Low PTEN expression was present in 26.2 % of patients and identified patients with worse prognosis. p16 was positive in only 8.5 % of tumors. CONCLUSIONS: Low PTEN expression in patients treated with cetuximab plus chemotherapy emerged as a prognostic biomarker and should be evaluated for its predictive role for cetuximab efficacy.