Primary Lymphoma of the Central Nervous System: Typical and Atypical CT and MR Imaging Appearances
AJR 176:1319-1326, Erdag,N.,et al, 2001
MR Imaging Presentation of Intracranial Disease Associated with Langerhans Cell Histiocytosis
AJNR 25:880-891, Prayer, D.,et al, 2004