OANA TRIFANESCU, MARIA IULIANA GRUIA, LAURENTIA GALES, RALUCA TRIFANESCU, ALINA MIHAELA PASCU, VLADIMIR POROCH, SEBASTIAN TOMA, CATALINA POIANA, RODICA ANGHEL MALONDIALDEHYDE AS A PROGNOSTIC MARKER IN PATIENTS WITH OVARIAN ADENOCARCINOMA Oxidative stress is defined as the imbalance between reactive oxygen species and cellular antioxidative mechanisms. Reactive oxygen species are involved in the development and progression of many cancers and has been showed to activate pro-tumorigenic signalling, increase tumour cell survival, proliferation, invasion and metastasis, DNA damage and genetic instability. These are highly reactive and attack various classes of essentials biomolecules such as proteins, DNA and most important lipids. Malondialdehyde is the best investigated product of lipid peroxidation. The aim of this study was to evaluate the prognostic role of malondialdehyde in patients with ovarian adenocarcinoma and in an experimental model.