Headache & Pain
Jan. 20, 2023
Nearly 3,000 illustrations, including video clips of neurologic disorders.
Every article is reviewed by our esteemed Editorial Board for accuracy and currency.
Full spectrum of neurology in 1,200 comprehensive articles.
Listen to MedLink on the go with Audio versions of each article.
Photomicrograph of multifocal leukoencephalopathy lesion, stained with antibody to JC virus capsid antigen. Numerous oligodendrocytes are positive for the presence of JC virus (white arrows). Several bizarre astrocytes are also present; these are negative for JC virus capsid antigen (green arrows). (Contributed by Dr. John Greenlee.)