A heterogeneous mass in the left parieto-occipital region with prominent hemosiderin staining and calcium (better seen on CT) has enhancing components as well as cystic components. Intrinsic T1 signal hyperintensity is in keeping with subacute blood.
The rCBV map is impossible to interpret given the amount of T2* effect from hemosiderin and calcification. Similarly, ADC values are difficult to interpret especially as the solid enhancing component is stretched into septae rather than nodular and coated in hemosiderin.
Conclusion
This is an unusual-appearing mass, most likely representing a tumour rather than a very large unusual cavernous malformation; the amount of enhancing tissue is excessive. It most likely represents a primary brain tumour and although a glioblastoma could have this appearance the prominence of calcification, blood and lack of convincing infiltrating component raises the possibility of alternative diagnoses e.g. supratentorial ependymoma, pilocytic astrocytoma, parenchymal neurocytoma etc...