XXXX : correlation of magnetic resonance imaging and pathologic findings.

@entity2694 @entity1 @entity5
PURPOSE: To report the correlation between magnetic resonance imaging (MRI) findings and histopathology of @entity2694 . METHODS: This study is a retrospective noncomparative interventional case series of three consecutive @entity1 with @entity2694 . After preoperative MRI, all @entity1 underwent orbitotomy and @entity5 removal. Histopathologic and immunopathologic studies of the excised @entity5 were performed. The main outcome measures were MRI features, histopathology, and their relationship to the @entity5 . RESULTS: The @entity1 ' ages were 56 years ( @entity1 1), 43 years ( @entity1 2), and 18 ( @entity1 3) years. MRI demonstrated that the @entity5 were well-circumscribed, intraconal in @entity1 1, superior extraconal in @entity1 2 and inferotemporal extraconal in @entity1 3. The @entity5 in @entity1 1 had a partly cavitary appearance, while the @entity5 in @entity1 2 and 3 had a solid appearance on MRI. The @entity5 had heterogeneous signal intensity in @entity1 1 and 2 and homogeneous signal intensity in @entity1 3 on T2-weighted images. All @entity1 underwent orbitotomy and @entity5 removal. In @entity1 1 and 2, the @entity5 was gelatinous and fragmented during removal. The fragments were completely excised in @entity1 1 and an incomplete piecemeal @entity5 excision was made in @entity1 2. In @entity1 3, complete excision without fragmentation was performed. Pathologic examination revealed that the @entity5 was of Antoni B pattern in @entity1 1, mixed Antoni A and B patterns in @entity1 2, and marked Antoni A pattern in @entity1 3. At a mean follow-up of 23.7 months (range: 22-26 months) after surgery, all @entity1 retained preoperative visual acuity. @entity1 2 developed recurrence at 21 months follow-up and underwent Kr  nlein orbitotomy for excision of the recurrent @entity5 . CONCLUSIONS: MRI is useful in depicting both the anatomic location and internal consistency of @entity5 . Schwannomas with MRI evidence of cavitary change or heterogeneous signal intensity on T2-weighted images were found to have marked Antoni B pattern on histopathology, imparting a friable structure and fragmented excision.
