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Genetic Characteristics of HER2 Positive Breast Cancer With Neoadjuvant TCHP Chemotherapy

Locally advanced breast cancer (LABC) is defined as breast cancer (BC) larger than 5 centimeters or with lymph node metastasis. Usually, LABC is treated with neoadjuvant chemotherapy (NAC) followed by curative surgery to reduce tumor size and eliminate micrometastasis. Response to NAC helps predict BC prognosis. Pathologic complete response (pCR), defined as no residual tumor cells after NAC, represents prolonged survival without BC recurrence and residual cancer burden score, based on residual tumor volume, and can more accurately predict BC outcomes. Especially, Human epidermal growth factor receptoor type 2(HER2)-positive breast cancer, having aggressive biologic characteristics, was mostly treated by NAC because of recent advance of highly effective targeted agents (pertuzumab and trastuzumab). However, still 30-40% of HER2-positive breast cancer did not response to NAC and underwent disease recurrence. Recently, genetic studies to find biomarker of BC prognosis have been widely performed. Circulating tumor DNA (ctDNA), which is circulating free DNA in the blood that originates from cancers, can be detected by recently-developed technologies. CtDNA could facilitate early disease detection, diagnosis and detection of disease recurrence. CtDNA also provides a genomic profile of BC and predicts drug response. In BC, ctDNA correlates with tumor burden and provides early detection of treatment response and tumor genetic alterations. In this study, the investigator aimed to identify the correlations in genomic profile between tumors and ctDNA during NAC(docetaxel /carboplatin /trastuzumab and pertuzumab) in HER2 positive breast cancer.

Start: March 2018
CAncer, NUtrition and Taste - Validation of the CANUT-QVA Questionnaire on Eating Habits in Cancer Patients

Cancer patients are at high risk of undernutrition, which is generally more pronounced for solid tumours (upper digestive tract, Ear Nose and Throat (ENT), bronchial tubes). This undernutrition leads to major weight loss and cachexia, and may represent the first sign of a call for a diagnosis of cancer. Cancer-related undernutrition is multi-factorial origins and has multiple consequences. Chemotherapy treatments can induce various adverse effects in patients, including sensory disturbances at the beginning of treatment in addition to disturbances that may already be present before any treatment. The alteration of taste and odour, observed in 86% of patients, can induce a change in food preferences, promote the development of aversions, and therefore, lead to a significant reduction in the pleasure of eating. Loss of appetite, decreased food intake and the development of aversions to certain foods are situations experienced by a large proportion of patients treated with chemotherapy. The assessment of taste disorders in patients treated with chemotherapy is established through the use of questionnaires, interviews and taste tests. Changes in the perception and identification of salty, sweet, bitter and sour flavours are common in patients treated with chemotherapy. As regards food products, patients report developing olfactory hypersensitivity mainly for food of animal origin, in particular for odours of fish, frying, cheese and eggs. The CANUT project aims to study the effect of pathology and chemotherapy on gustatory and olfactory mechanisms, and in particular on interindividual differences in the perception and appreciation of food. In order to monitor the evolution of patients' eating habits over time, the diet-related quality of life questionnaire (CANUT-QVA) was constructed from items selected from the Well-being related to Food questionnaire (WELLBFQ) after eliminating questions that were too general or expressed in terms of importance to use perception-related responses as a priority. After this part, an evaluation of the 9 dimensions of the CANUT-QVA questionnaire will be performed.

Start: December 2019