The oncoplastic breast-conserving surgery were mainly those surgeries using volume displacement or volume replacement techniques

The conventional breast-conserving surgery were performed without any oncoplastic operations

The patients received oncoplastic breast-conserving surgery, including volume displacement or volume replacement techniques

The Breast-Q© is a patient reported outcome measure (PROM) for breast surgery that was rigorously developed to accurately measure patient reported satisfaction and quality of life (QOL). (http://www.mskcc.org/mskcc/shared/Breast-Q/index.html). The BREAST-Q was developed and validated with adherence to international guidelines. This PROM is composed of six scales that address: 1) psychosocial well-being, 2) physical well-being, 3) sexual well-being, 4) satisfaction with breasts, 5) satisfaction with outcome, and 6) satisfaction with care. Each module generates a Q-score on a 0-100 scale that can be used for quantitative analysis to enable statistical comparison of the pre- to the post-operative state.

The EORTC QLQ-C30 (Version 3) uses for the questions 1 to 28 a 4-point scale. The scale scores from 1 to 4: 1 ("Not at all"), 2 ("A little"), 3 ("Quite a bit") and 4 ("Very much"). Half points are not allowed. The range is 3. For the raw score, less points are considered to have a better outcome. The EORTC QLQ-C30 (Version 3) uses for the questions 29 and 30 a 7-points scale. The scale scores from 1 to 7: 1 ("very poor") to 7 ("excellent"). Half points are not allowed. The range is 6. First of all, raw score has to be calculated with mean values. Afterwards linear transformation is performed to be comparable. More points are considered to have a better outcome.

EORTC QLQ-BR-23 consists of 23 questions related to breast cancer. The questionnaire will be self-administered and will be given in patient's mother tongue. EORTC-QLQ-BR23: included functional scales (body image, sexual functioning, sexual enjoyment, and future perspective) and single item symptoms scales (systemic therapy side effects, breast symptoms, arm symptoms, and upset by hair loss). Questions used 4-point Likert scale (1 'Not at All' to 4 'Very Much'). Scores averaged and transformed to 0-100 scale. High score for functional scale=high/healthy level of functioning. High score for single item=high level of symptomatology/problems.

Postoperative complications were classified following Clavien-Dindo Classification. Grade I complication (light inflammations, non-surgical haematoma or suffusion, seroma formation, partial skin/NAC loss, limited fat necrosis, SSI and lymphoedema) does not require medication or surgical treatment. Grade II complication is a Grade I complication that requires medication or surgical interaction (antibiotic therapy, resuture due SSI and multiple puncture due chronic seroma). Grade III complication requires invasive surgical action (haematoma evacuation, chronic inflammation which requires reoperation, severe fat necrosis, full skin/ NAC necrosis and wound dehiscense). Grade IV complication means temporary organ failure. Grade V complication is one that leads to death