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Fig 2. A–D, Case 5. Solitary fibrous tumor of the orbit in a 24-year-old woman. Postcontrast (A) axial CT scan and axial T1-weighted (B), T2-weighted (C), and postcontrast fat-suppressed T1-weighted (D) MR images show a 18-mm well-defined ovoid soft tissue mass in the inferomedial aspect of the intraconal space of the left orbit. Like the tumor shown in Fig 1, the mass conforms to the ocular contour without causing significant indentation. Compared with the cerebral gray matter, the mass is slightly hyperattenuated on precontrast CT scan (not shown), isointense on T1-weighted MR image (B), and mixed isointense and hyperintense and T2-weighted MR image (C). There is marked homogeneous enhancement of the tumor on postcontrast CT (A) and MR (D) images. Note the signal intensity void, tubular vascular structures inside the tumor on MR images (arrows).
