In the period of time from Oct., 1956, to June, 1958, in the Department of Neurology of the University of Bari, 4 cases of posttraumatic chronic subdural hematomas were observed in which the clinical symptoms and the characteristic arteriographic picture regressed completely without surgical intervention.1Their treatment consisted of bed rest and an ample diet fortified with a variety of vitamins, antihemorrhagic and vasoprotective drugs, corticosteroids, and intravenous injections of hypertonic glucose solutions. Since that time, several other unpublished cases have been observed which responded as well to this supportive therapy. Some of these patients are still under observation and warrant a longer follow-up. Three of them, however, may be considered symptom-free and will be herein reported. Report of Three Cases Case 1.—A 57-year-old man was admitted to the Department of Neurology on Oct. 9, 1958, with a history of headaches, more marked in the left frontal region, of