Grade 1 Leukoencephalopathy, CTCAE

**Semantic type:** Finding

**Definition:** Asymptomatic; small focal T2/FLAIR hyperintensities; involving periventricular white matter or <1/3 of susceptible areas of cerebrum +/- mild increase in subarachnoid space (SAS) and/or mild ventriculomegaly

**Synonyms:** - Grade 1 Leukoencephalopathy - Grade 1 Leukoencephalopathy