• Secondary: metastases to the nervous system in lymphoma affecting other organs
11
PCNSL: Epidemiology
• Once rare (~1%), now becoming increasingly more common
25
90-year-old woman with normal immune status who presented with right-
sided weakness and difficulty finding words.
•Axial T2-weighted MR image shows ill-defined T2 hyperintensity (arrows)
CASE DISCUSSION
WANG LIJUN 2008-7-14
1
• Case 1: Female, 66y
2
• Case 1: PLAIN MRI
3
• Case 1: POST-CONTRAST MRI
4
Case 2: F 66Y
5
• Case 2: POST-CONTRAST MRI
– Head CT detects most lesions (~90%) – Brain MRI may detect lesions missed on CT
15
Diagnosis
• Primary lymphoma may arise from different parts of the brain
22
50-year-old immunocompetent man with primary CNS non-Hodgkin's Bcell lymphoma. • Axial T2-weighted MR image shows infiltrative hyperintense mass expanding genu and splenium of corpus callosum in butterfly pattern. • contrast-enhanced axial T1-weighted MR image shows homogeneous enhancement of lesion.