Figure 1.

Example of a 31-year-old patient with an anaplastic astrocytoma in the left parahippocampal region with posttherapeutic effects. Previous treatment consisted brachytherapy and external fractionated radiotherapy with concomitant and adjuvant temozolomide. Brain imaging with standard MRI and FET PET at recurrence/before initiation of chemotherapy (left column) and 4 months later after two cycles of lomustine chemotherapy (right column). Enlargement of contrast enhancement and the T2 signal is suggesting tumor progression, whereas FET PET indicates a reduction of metabolic activity.