title: Traumatic subdural hygroma: five cases with changed density and spontaneous resolution.
abstract: Thirty-four consecutive adult patients with subdural traumatic hygroma were analysed for clinical evolution, serial computed tomography scan (CT), and magnetic resonance imaging (MRI) over a period of several months. Five of the patients presented CT scan and MRI evolution data showing increasing density over a period of 11 days to 6 months post trauma. In these five patients, final clinical and CT scan data were benign, with complete spontaneous resolution. Descriptions in literature of evolving traumatic subdural hygroma have presented CT scan density modifications changing into chronic subdural hematoma. Our patients show another possibility, density transformation, which sometimes show as subdural hematoma in CT scan and MRI, but with final evolution where clinical condition and CT scan return to normal.
authors.affiliation: Services of Neurosurgery, Department of Neurology and Psychiatry, Botucatu School Medicine, State University of Sao Paulo, 18618-970 Botucatu, SP, Brazil. mzanini@fmb.unesp.br
authors.forename: Marco Antonio
authors.initials: MA
authors.lastname: Zanini
authors.forename: Luiz Antonio de Lima
authors.initials: LA
authors.lastname: Resende
authors.forename: Carlos Clayton Macedo de
authors.initials: CC
authors.lastname: Freitas
authors.forename: Seizo
authors.initials: S
authors.lastname: Yamashita
mesh_terms: D000293:Adolescent; D000328:Adult; D000369:Aged, 80 and over; D006259:Craniocerebral Trauma / Q000150:complications*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012075:Remission, Spontaneous; D013353:Subdural Effusion / Q000175:diagnosis / Q000209:etiology*; D014057:Tomography, X-Ray Computed