The investigators aim to document the surgery-specific and overall Quality of life parameters of patients undergoing all types of breast surgery at the University Hospital of Basel

The planned ten-year follow-up using Patient reported outcome measure will give us the unique opportunity to gain insight into patients' breast-related QoL (Quality of Life) long after surgery and detect systematic issues that may affect them beyond the scope of routine follow-up consultations. Along with the detection of any occurring adverse events, the information gathered in the database will facilitate the search for risk factors involved in their development, ideally resulting in their rectification and thus contributing to patient well-being in the long term.

Inclusion Criteria:

• adults who underwent any type of breast surgery at the University Hospital of Basel

Exclusion Criteria:

• Patients under the age of 18 years, without general consent or written informed consent, with insufficient language comprehension or other factors limiting their ability to co-operate in the study

patients who underwent breast surgery at the University Hospital Basel from 2014 onwards