[Walter E. Dandy, U.S. neurosurgeon, 1886-1946; Arthur E. Walker, U.S. surgeon, 1907-1995]
A congenital brain malformation characterized by fourth ventricle (posterior fossa) cystic dilation, hydrocephalus, and improper formation of the cerebellar vermis.
Treatments sometimes include cyst drainage or ventriculoperitoneal shunting.
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