MRI features of canine hemangiosarcoma affecting the central nervous system

Mallol, C. et al. (2022) MRI features of canine hemangiosarcoma affecting the central nervous system. Veterinary Radiology and Ultrasound, 63(2), pp. 185-196. (doi: 10.1111/vru.13041) (PMID:34873768)

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Hemangiosarcoma is the most common metastatic tumor involving the brain in dogs but detailed published descriptions of the magnetic resonance imaging (MRI) features are lacking. The objective of this multi-center, retrospective case series study was to describe MRI characteristics of canine hemangiosarcoma affecting the central nervous system (CNS). Medical records of seven referral institutions were retrospectively reviewed. Dogs were included if they had a histopathologically confirmed diagnosis of hemangiosarcoma affecting the CNS and undergone an MRI of the brain and/or vertebral column. Lesions were independently evaluated by two observers. Twenty dogs met the inclusion criteria and one dog had both intracranial and intramedullary hemangiosarcoma. Consistent MRI features included heterogeneous (17/21) lesions in all sequences with mainly mixed signal intensity (12/21), presence of susceptibility artifact on T2*w (15/16), associated moderate to severe perilesional edema (21/21), and moderate to strong (20/21) heterogeneous (14/21) or ring-like (6/21) contrast enhancement. Intracranial hemangiosarcoma was frequently multiple and intra-axial, affecting consistently the telencephalon and no differences in MRI features were found between primary and metastatic hemangiosarcoma. This is the first MRI description of primary intracranial hemangiosarcoma and primary intracranial epithelioid hemangiosarcoma. Vertebral hemangiosarcomas were segmental poorly marginated polyostotic and highly aggressive lesions invading the thoracic vertebral canal and paraspinal tissues. Epidural hemangiosarcomas were single and well-marginated lesions in the thoracolumbar and/or lumbar region. Intramedullary hemangiosarcomas were cervical, metastatic in origin, and frequently (3/4) accompanied by intracranial lesions. These described MRI features will aid early identification of hemangiosarcoma guiding subsequent diagnostics and therapeutics.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Stalin, Mrs Catherine and Gutierrez Quintana, Mr Rodrigo and Hammond, Dr Gawain
Authors: Mallol, C., Gutierrez‐Quintana, R., Hammond, G., Schweizer‐Gorgas, D., De Decker, S., Novellas, R., Espada, Y., Oevermann, A., Ortega, M., Parry, A., Coelho, A. M., Gonçalves, R., Stalin, C., and Brocal, J.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Veterinary Radiology and Ultrasound
ISSN (Online):1740-8261
Published Online:06 December 2021
Copyright Holders:Copyright © 2021 American College of Veterinary Radiology
First Published:First published in Veterinary Radiology and Ultrasound 63(2): 185-196
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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