Fig. 4

Quality of life using SF-36 questionnaire. Different parameters of quality of life are presented with a radar chart. We see different patterns of changes in both patients, but consistent improvements in both in physical, emotional and general health, absence of pain and benefits in energy and fatigue. Bar charts show total scores of the SF-36 questionnaire with significant improvements compared to preoperative statements in both patients (one-sided paired T-test; pt. 1: T = −3.2, p = 0.0015; pt. 2: T = −1.7, p = 0.048)