Fig. 9From: Brain tumour post-treatment imaging and treatment-related complicationsPseudoresponse. A 38-year-old male with left frontal astrocytoma. Initial imaging demonstrates a peripherally enhancing lesion in the left frontal lobe. Follow-up imaging 4Â weeks after starting bevacivumab demonstrates a marked interval decrease in enhancement (arrow). However, there is persistent T2 FLAIR hyperintensity and low ADC signal (arrowheads). Serial imaging afterwards (not shown) demonstrated progression in T2 FLAIR hyperintensity and mass effect, confirming pseudoresponseBack to article page