====== Cerebral hemosiderosis ======

Although the effectiveness of [[hemispherectomy]] was established, the high incidence of [[hydrocephalus]] and delayed mortality from superficial cerebral [[hemosiderosis]] in up to one-third of patients led to a rapid decline in the procedure
((Oppenheimer DR, Griffith HB: Persistent intracranial bleeding as a complication of hemispherectomy. J Neurol Neurosurg Psychiatry 29:229–240, 1966))
((Wilson PJ: Cerebral hemispherectomy for infantile hemiplegia. A report of 50 cases. Brain 93:147–180, 1970)).

In the 1970s, Rasmussen recognized that the [[extent of resection]] and the residual surgical cavity were contributing factors to superficial [[cerebral hemosiderosis]]. Preservation of the frontal and occipital lobes and disconnecting them from the rest of the brain resulted in a “functional complete but anatomical subtotal hemispherectomy,” giving rise to the functional hemispherectomy, which protected against superficial cerebral hemosiderosis and delayed hydrocephalus, and to a resurgence for the [[disconnection procedure]]
((Rasmussen T: Hemispherectomy for seizures revisited. Can J
Neurol Sci 10:71–78, 1983)).