[Clinical and angiographic aspects of a unilateral chronic convexity subdural hematoma].

The Authors reviewed 52 cases of unilateral chronic subdural hematoma (c.s.h.) of the convexity from the clinical and angiographic point of view. They stated that it is possible to subdivide the c.s.h. into three main clinico-angiographic types: type 1: with focal symptoms and with almost always "biconvex" shape; type 2: with signs of intracranial hypertension and with "transitional or "biconvex" shape; type 3: with prevalent consciousness alterations and with "transitional" or "crescentic" shape. The shifting of the medial structure in relationship with the size of the hematoma is also discussed.