All patients who are suffering from brain tumor of brain metastases and are willing to participate.

The treatment-plan of the underlying disease remained unchanged. Blood draw and MRI from patients at several time points during and after radio(chemo)therapy.

The study is observational. The treatment-plan of the underlying disease remained unchanged. Blood draw and MRI from patients at several time points during and after radio(chemo)therapy.

CMV infection will be monitored by virus analysis by an approved laboratory. The analyses were conducted at time points during and after RCT - before RT (day 0), during RT (dose halftime), end of RT (last day of RT), month 3 and 6 after completed RT. This scheme is repeated if patient receives additional RT for relapse treatment. The time points during RT were determined depending on the applied irradiation dose. For glioblastoma the halftime of RT is usually day 23 (received dose 30 Gy) and the end of therapy is usually day 45 (received dose 60 Gy). For cerebral metastases the halftime of the RT is usually day 8 (received dose 9 Gy) and day 16 at the end of therapy (received dose 18 Gy). However, the time points are strongly connected to the received dose.

Immunophenotyping of the patients. Detection of about 30 distinct immune sell (sub)types together with their activation markers.The analyses were conducted at time points during and after RCT - before RT (day 0), during RT (dose halftime), end of RT (last day of RT), month 3 and 6 after completed RT. This scheme is repeated if patient receives additional RT for relapse treatment. The time points during RT were determined depending on the applied irradiation dose. For glioblastoma the halftime of RT is usually day 23 (received dose 30 Gy) and the end of therapy is usually day 45 (received dose 60 Gy). For cerebral metastases the halftime of the RT is usually day 8 (received dose 9 Gy) and day 16 at the end of therapy (received dose 18 Gy). However, the time points are strongly connected to the received dose.