A Clinical Update and Radiologic Review of Pediatric Orbital and Ocular Tumors
Figure 8
13 years old with Crohn disease. MR axial (a) and coronal (b) T2-weighted fat saturated, MR precontrast axial T1-weighted fat saturated (c), postcontrast axial (d) and coronal (e) T1-weighted fat saturated, and axial diffusion-weighted (f) images showing an infiltrative, diffusely enhancing soft-tissue mass involving the left superior rectus muscle (black arrows) with restricted diffusion (white arrow). This lesion responded to steroid therapy, supporting the suspected diagnosis of OIS. The fact that this lesion showed intermediate diffusion restriction (ADC value of 0.9-1 × 10−3 mm2/s) demonstrates the difficulty in discriminating between lymphoproliferative disease and OIS.
