"T1: iso to slightly hypointense to grey matter 1-3"
"T2: hyperintense to grey matter"
"T1 C+ (Gd): usually no enhancement"
Expected headings
"Risk factor"
"The vast majority of lesions are low grade astrocytoma, although occasionally other glial series tumours are encountered in the tectal region including ependymoma, ganglioglioma and primitive neuroectodermal tumours (PNET) 3."