Home | | Ophthalmology | Intraocular Optic Nerve Tumors

Chapter: Ophthalmology: Optic Nerve

Intraocular Optic Nerve Tumors

Intraocular Optic Nerve Tumors
Melanocytoma (Fig. 13.19): These are benign pigmented tumors that pri-marily occur in blacks. The color of the tumor varies from gray to pitch black.

Tumors

Optic nerve tumors are classified as intraocular or retrobulbar tumors.

Intraocular tumors are rare.

Intraocular Optic Nerve Tumors

Melanocytoma (Fig. 13.19): These are benign pigmented tumors that pri-marily occur in blacks. The color of the tumor varies from gray to pitch black. It is often eccentric and extends beyond the margin of the optic disk. In 50% of all cases, one will also observe a peripapillary choroidal nevus. Visual acuity is usually normal, although discrete changes in the visual field my be present.


Astrocytoma (Fig. 13.20): Astrocytomas appear as white reflecting “mul-berry” masses that can calcify. Their size can range up to several disk diame-ters. The tumor is highly vascularized. Visual field defects can result where the tumor is sufficiently large to compress the optic nerve. Astrocytomas occur in tuberous sclerosis (Bourneville’s disease) and neurofibromatosis (Recklinghausen’s disease).


Hemangioma (Fig. 13.21): Capillary hemangiomas are eccentric, roundorange-colored vascular deformities on the optic disk (von Hippel disease). They may occur in association with other angiomas, for example in the cere-bellum (in von Hippel-Lindau disease).




 

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
Ophthalmology: Optic Nerve : Intraocular Optic Nerve Tumors |


Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2024 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.