Imaging Manifestations of Progressive Multifocal Leukoencephalopathy
Clinical Radiol 65:431-439, Shah,R.,et al, 2010
AIDS - Related Lymphomas: Primary CNS Lymphoma
UpToDate, April, Doweiko, J.P., 2010
Evaluation of Malignancy in Ring Enhancing Brain Lesions on CT by Thallium-201 SPECT
JNNP 63:569-574, Kallen,K.,et al, 1997