Mastectomy Clinical Trial
Official title:
Impact of Neoadjuvant Hormonal Therapy on the Surgical Management of Extensive Ductal Carcinomas in Situ
Ductal carcinoma in situ (DCIS) accounts for approximately 20% of newly diagnosed breast cancer cases. Of these women, 20% require radical management in the form of mastectomy because of the extent of the lesions, which most often manifest as diffuse microcalcifications. This mutilating surgical management contrasts with the excellent prognosis of this pathology and considerably alters the quality of life of patients. Neoadjuvant hormone therapy has shown its efficacy in hormone-dependent infiltrating ductal carcinomas and offers the possibility of conservative surgery after hormone therapy. Adjuvant hormone therapy with Tamoxifen or anti-aromatase drugs has shown its efficacy in the prevention of homo or contralateral recurrence. The HORNEO 01 trial fits perfectly in the current context of surgical de-escalation of ductal carcinomas in situ. The objective of the study is to evaluate the impact of neoadjuvant hormone therapy on the surgical management of extensive DCIS.
Description of the modalities for recruiting : Following screening and discovery of a DCIS, patients are referred to the center for surgical management. During a standard consultation, the surgeon presents the study to the patient who has been diagnosed with extensive DCIS with an indication for mastectomy. The surgeon provides the patient with the information note and the consent form to participate in the study. Once the consent form is signed by the patient and the investigator, the investigator prescribes a screening test to be performed within 30 days prior to the start of hormone therapy. Screening assessment includes : A clinical exam and a breast imaging exam (mammography and breast and axillary ultrasound). In case of a suspicious breast ultrasound image, microbiopsy will be performed to eliminate an infiltrating component. One or more macrobiopsy. Each biopsied site will be located using an X-ray clip inserted at the time of sample. A MRI post-macrobiopsy. Research of estrogen receptor expression Once the investigator has verified and validated all the eligibility criteria, the patient will be included. Prescriptions for Tamoxifen (non-menopausal patients) or Anastrozole (menopausal patients) are given to patients and dispensed by the center's pharmacy. Monitoring during treatment : Patients will benefit from imaging monitoring (Mammography, +/- breast ultrasound, +/- axillary ultrasound, MRI) at 3 months and 6 months during hormonotherapy. In case of progression observed during treatment, hormone therapy will be stopped and you will then benefit from a mastectomy. Surgery : Mastectomy or tumorectomy will be performed according to the tumor response to hormone therapy observed on MRI. All patients will benefit sentinel node detection. An additional axillary dissection will be performed based on the results of the sentinel node analysis. Analysis of biomarkers and tumor microenvironment before and after treatment on diagnostic macrobiopsies and on tumorectomy or mastectomy will be performed at Institut de Cancérologie de l'Ouest. Patients will be seen in postoperative consultation. Adjuvant treatments or re-surgical interventions will be prescribed, carried out, and the patients will be followed up and examined at 6 months after surgery or at the end of adjuvant treatments and then annually for 10 years (with control mammography). Patients who have had conservative surgery will have an MRI at 6 months from the end of radiotherapy. All patients will be asked to complete quality of life questionnaires at baseline, 6 and 12 months post-surgery, and annually for 9 years: EORTC QLQ-C30 (up to 5 years only), Short Form (36) Health Survey questionnaire. ;
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