Differential Diagnosis of Space-Occupying Brain Lesions in two cases Shen yifan
Differen'al Diagnosis of Space-Occupying Brain Lesions in Two Cases Shen Yifan
Introduction Brain lesions The discovery of a cns lesion is made by head ct or MRI MRI has a number of advantages compared to ct scan CNS mass lesions can be classified into two categories according to the presence or absence of mass effect Mass Effect Space-Occupying effect
Introduc'on • Brain Lesions • The discovery of a CNS lesion is made by head CT or MRI. • MRI has a number of advantages compared to CT scan. • CNS mass lesions can be classified into two categories, according to the presence or absence of mass effect. • Mass Effect • Space-Occupying effect
AIDS patient with progressive multifocal leukoencephalopathy Pml PE 0aD 3 M TE Lac/Lp www
AIDS pa'ent with progressive mul'focal leukoencephalopathy (PML)
CNS lesions with mass effect Local presentations are characterized by the e presence o swelling edema, and mass effect on Midline surrounding structures Tentorium In some cases Uncal herniation especially for lesions Brainstem located in the posterior fossa, cerebral herniation occurs
CNS lesions with mass effect • Local Presenta2ons • are characterized by the presence of swelling, edema, and mass effect on surrounding structures. • In some cases, especially for lesions located in the posterior fossa, cerebral herniaFon occurs
Cerebral herniation 8 Tumor. 7
Cerebral hernia'on