The median overall survival of our cohort was 10.9 months (range 3.0 to 43.3; Fig. 1a). The median progression free survival was 5.7 months (range 1.2-31.7; Fig. 1b). Local recurrence occurred in 25 cases, local and distant in 10 cases and distant recurrence occurred in 4 cases. Clinical progression occurred in 7 cases, in two of these cases an MRI could not describe a specific focus. For the 5 patients remaining, MRI was not performed as the patients were not deemed to be able to undergo a salvage treatment. 12 patients died without clinical or imaging evidence for progression. At the time of our analysis, 12 patients were still alive, 1 of these patients without evidence for progression after the initial treatment, one further patient was loss of follow up.Fig. 1Kaplan Meier estimates of a overall survival and b progression free survival