Brain microvascular pathology in Susac syndrome: an electron microscopic study of five cases

Title

Brain microvascular pathology in Susac syndrome: an electron microscopic study of five cases

Creator

Agamanolis Dimitri P; Prayson Richard A; Asdaghi Negar; Gultekin Sakir H; Bigley Kim; Rennebohm Robert M

Publisher

Ultrastructural Pathology

Date

2019
2019-11-16

Description

Susac syndrome is a rare, immune-mediated disease characterized by encephalopathy, branch retinal artery occlusion, and hearing loss. Herein, we describe the electron microscopic findings of three brain biopsies and two brain autopsies performed on five patients whose working clinical diagnosis was Susac syndrome. In all five cases, the key findings were basement membrane thickening and collagen deposition in the perivascular space involving small vessels and leading to thickening of vessel walls, narrowing, and vascular occlusion. These findings indicate that Susac syndrome is a microvascular disease. Mononuclear cells were present in the perivascular space, underlining the inflammatory nature of the pathology. Though nonspecific, the changes can be distinguished from genetic and acquired small vessel diseases. The encephalopathy of Susac syndrome overlaps clinically with degenerative and infectious conditions, and brain biopsy may be used for its diagnosis. Its vascular etiology may not be obvious on light microscopy, and electron microscopy is important for its confirmation.

Subject

hearing loss; Susac syndrome; electron microscopy; encephalopathy; branch retinal artery occlusion; cerebral vasculitis; corpus callosal lesions

Identifier

PMID: 31736417

Format

Journal Article

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Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Pages

1-8

ISSN

1521-0758

Citation

Agamanolis Dimitri P; Prayson Richard A; Asdaghi Negar; Gultekin Sakir H; Bigley Kim; Rennebohm Robert M, “Brain microvascular pathology in Susac syndrome: an electron microscopic study of five cases,” NEOMED Bibliography Database, accessed December 4, 2021, https://neomed.omeka.net/items/show/10807.

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