Breast Cancer Clinical Trial
Official title:
Retrospective Cohort Study of Overall Survival and Disease-free Survival in Breast Cancer Patients Who Underwent Controlled Ovarian Stimulation (COS)
The main objective of the study is to evaluate the overall survival and disease-free survival in breast cancer patients under 40 years old. They underwent controlled ovarian stimulation (COS) for fertility preservation versus women of the same age, type and stage of breast cancer, who have not been subjected to COS.
Breast cancer is a disease where the tumor size, lymph node involvement and histological
grade provide rich information about prognosis and enable to stage the disease. As in any
other oncological pathology, stage of disease at diagnosis is the major determining factor
for estimating survival. Ovarian stimulation for fertility preservation is performed in this
study, in patients with stage I-II (TNM) after the neoplasia is treated (surgical removal of
the tumor) prior to systemic therapy, when indicated.
Among young women there is a greater incidence of basal type tumors and HER2 (human
epidermal growth factor receptor 2), which do not always express hormone receptors. In early
stages of the disease, the controlled ovarian stimulation procedure, after removal of the
tumor, has not revealed any worsening in the prognosis of the disease, in terms of overall
survival and disease-free survival (absence of local or distant recurrence).
It is a study that aims to collect data retrospectively from 2008 to 31 December 2015. To
this end, we will collect the follow-up data, up to 5 years for patients from 2008, 2009 and
2010. Four years for patients in 2011, 3 years for 2012, 2 years for 2013, one year for
those included until 31 December 2014 and patients followed until 31 December 2015. Each
patient is called in order to request data authorization, to complete and track information.
;
Observational Model: Cohort, Time Perspective: Retrospective
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