A Clinical Update and Radiologic Review of Pediatric Orbital and Ocular Tumors
Figure 10
8 years old with orbital prosthesis status postenucleation for retinoblastoma presents with proptosis. MR axial (a) and sagittal (b) T1-weighted postcontrast fat-saturated images demonstrate homogeneously enhancing infiltrative tissue behind the prosthesis (black arrows). Increased signal along the course of the optic nerve is consistent with perineural spread of disease (curved white arrow). Axial diffusion-weighted image at the same level shows increased signal within the mass due to highly cellular tissue (decreased diffusion, corroborated by ADC maps (not shown)). Biopsy confirmed lymphoma.
