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Fig. 4 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 4

From: High Resolution MR Imaging guidelines in retinoblastoma: prospective study correlated with histopathological results

Fig. 4

Bilateral retinoblastoma and postlaminar optic nerve invasion of the right retinoblastoma. Axial T2-weighted MR image (a) shows bilateral retinoblastomas. Right retinoblastoma is exophytic with total retinal detachment and subretinal fluid and no residual vitreous. Left retinoblastoma is small focal endophytic lesion of the nasal retina, demonstrating lower signal intensity than does the ocular fluid. Postcontrast axial (b) and sagittal MR images of the right orbit (c) show bilateral enhancement of both intraocular masses. Abnormal enhancement and thickening of the optic nerve with tumor enhancement continuity in the distal optic nerve(more evident in sagittal T1 WI with contrast), a finding indicative of postlaminar optic nerve invasion. Maximum axial diameter of the right retinoblastoma 1.6 cm. Maximum axial diameter of the left retinoblastoma 0.9 cm

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