Ss. Rengachary et al., LOCALIZED CYSTIC SUBDURAL HYGROMA - CASE-REPORT, The journal of trauma, injury, infection, and critical care, 36(6), 1994, pp. 890-893
We report a new variant of subdural hygroma previously undocumented in
the literature. A 29-year-old man had a skull mass and a progressive
headache of 6 to 7 years duration. He was involved in a car crash 8 ye
ars earlier and had an unrecognized skull fracture. During surgery the
lesion was found to be a localized, cystic subdural hygroma communica
ting with the subarachnoid space through a narrow opening. This lesion
is unique because: (1) the subdural hygroma was limited by an adhesio
n between the dura and the arachnoid; the actual communication between
the subdural hygroma and the subarachnoid space was clearly identifie
d; and (3) localized bulging of the skull is exceptional for a subdura
l hygroma. Differentiation from more common cystic lesions such as con
genital arachnoid cysts, traumatic arachnoid cysts, intradiploic arach
noid cysts, and chronic subdural hematomas is discussed.