Figure 2. A 60-year-old woman with surgically confirmed adenocarcinoma of unknown origin (brain metastasis case 6). (a) Axial fluid attenuated inversion recovery (FLAIR) image (8000/120/2300/1 [repetition time/echo time/inversion time/number of excitations (TR/TE/TI/NEX)]) shows a hyperintense mass with cystic component surrounded by moderate degree of oedema. (b) Axial post-contrast T1 weighted image (540/15/1.4 [TR/TE/NEX]) shows enhancement of the solid part as well as that of the cyst wall. (c) Fractional anisotropy (FA) map shows lower FA of the solid part (*, 0.08) than that of the peritumoural oedematous part (0.18). Displaced white-matter fibres are also visible (arrow).