XXXX . Incidence and familial occurrence.

@entity1 @entity410 @entity75 @entity600 @entity5380
We studied 24 @entity1 with histologically verified @entity5380 , reviewing the familial occurrence and presenting signs, symptoms, and radiographic features of the disorder. Eleven @entity1 had no evidence of a heritable trait and had negative family histories. Thirteen @entity1 were members of six unrelated Mexican-American families. Sixty-four first-degree and second-degree relatives were examined, and family pedigrees were established. Most relatives (83 percent) were asymptomatic; 11 percent had @entity410 . Magnetic resonance imaging was performed in 16 relatives (5 of whom were asymptomatic). Fourteen of the 16 studies revealed cavernous @entity600 ; 11 studies identified @entity75 . As compared with computerized tomography and angiography, magnetic resonance imaging was far more accurate in detecting cavernous @entity600 . We conclude that cavernous @entity600 are more prevalent than previously reported, and that a familial form of the disorder exists that is more common than expected, with a high incidence of @entity75 and an increased frequency of occurrence among Mexican-American families. Magnetic resonance imaging is the radiographic technique of choice for the identification and follow-up of these lesions.
