A review of orbital and intracranial magnetic resonance imaging in 79 canine and 13 feline patients (2004-2010)

Micki D. Armour, Michael Broome, Giuseppe Dell'Anna, Natalie J. Blades, Douglas W. Esson

Research output: Contribution to journalArticle

Abstract

Objective To review the distribution of orbital and intracranial disease in canine and feline patients undergoing magnetic resonance imaging (MRI) following referral to a veterinary ophthalmologist and to correlate results of MRI with pathologic conditions including neoplasia, suspected optic neuritis (ON) and orbital cellulitis. Recognized and emerging imaging techniques are reviewed. Procedure Medical records of 79 canine and 13 feline patients were reviewed. Results Neoplasia was diagnosed in 53/92 (57.6%) of patients. The most prevalent types of neoplasia were carcinoma (16/53, 30.1%), sarcoma (11/53, 20.8%), lymphoma (8/53, 15.1%) and presumptive meningioma (9/53, 17.0%). Carcinomas and sarcomas were characterized by bony lysis and intracranial/sinonasal extension. Lymphoma was generally unilateral, less invasive and originated from the ventromedial orbit. Intracranial masses representing presumptive meningiomas frequently exhibited a 'dural tail' sign. Diagnosis of suspected ON was made in 13 of 92 (14.1%) patients. Results of MRI in patients with suspected ON included unilateral optic nerve hyperintensity (3/13, 23.0%), bilateral optic nerve hyperintensity (1/13, 7.7%) and optic chiasmal hyperintensity (3/13, 23.0%). Seven suspected ON patients demonstrated intracranial multifocal patchy contrast enhancement (7/13, 53.8%). Diagnosis of orbital cellulitis was made in 12/92 (13.0%) patients. Conclusions Orbital neoplasia was the most common pathologic condition detected. Essential Roentgen characteristics are helpful when diagnosing pathologic processes and providing prognoses in cases of orbital or intracranial disease. Magnetic resonance imaging comprises an important diagnostic component in cases of suspected ON. Emerging contrast and functional MRI techniques as well as SI data may increase our ability to characterize disease processes.

Original languageEnglish (US)
Pages (from-to)215-226
Number of pages12
JournalVeterinary Ophthalmology
Volume14
Issue number4
DOIs
StatePublished - Jul 2011
Externally publishedYes

Fingerprint

Felidae
optics
magnetic resonance imaging
Optic Neuritis
Canidae
Magnetic Resonance Imaging
cats
dogs
Orbital Cellulitis
cellulitis
Meningioma
neoplasms
Optic Nerve
Sarcoma
sarcoma
lymphoma
Lymphoma
Neoplasms
carcinoma
Orbital Diseases

Keywords

  • Canine
  • Feline
  • Magnetic resonance imaging
  • Neoplasia
  • Optic neuritis
  • Orbit

ASJC Scopus subject areas

  • veterinary(all)

Cite this

A review of orbital and intracranial magnetic resonance imaging in 79 canine and 13 feline patients (2004-2010). / Armour, Micki D.; Broome, Michael; Dell'Anna, Giuseppe; Blades, Natalie J.; Esson, Douglas W.

In: Veterinary Ophthalmology, Vol. 14, No. 4, 07.2011, p. 215-226.

Research output: Contribution to journalArticle

Armour, Micki D. ; Broome, Michael ; Dell'Anna, Giuseppe ; Blades, Natalie J. ; Esson, Douglas W. / A review of orbital and intracranial magnetic resonance imaging in 79 canine and 13 feline patients (2004-2010). In: Veterinary Ophthalmology. 2011 ; Vol. 14, No. 4. pp. 215-226.
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abstract = "Objective To review the distribution of orbital and intracranial disease in canine and feline patients undergoing magnetic resonance imaging (MRI) following referral to a veterinary ophthalmologist and to correlate results of MRI with pathologic conditions including neoplasia, suspected optic neuritis (ON) and orbital cellulitis. Recognized and emerging imaging techniques are reviewed. Procedure Medical records of 79 canine and 13 feline patients were reviewed. Results Neoplasia was diagnosed in 53/92 (57.6{\%}) of patients. The most prevalent types of neoplasia were carcinoma (16/53, 30.1{\%}), sarcoma (11/53, 20.8{\%}), lymphoma (8/53, 15.1{\%}) and presumptive meningioma (9/53, 17.0{\%}). Carcinomas and sarcomas were characterized by bony lysis and intracranial/sinonasal extension. Lymphoma was generally unilateral, less invasive and originated from the ventromedial orbit. Intracranial masses representing presumptive meningiomas frequently exhibited a 'dural tail' sign. Diagnosis of suspected ON was made in 13 of 92 (14.1{\%}) patients. Results of MRI in patients with suspected ON included unilateral optic nerve hyperintensity (3/13, 23.0{\%}), bilateral optic nerve hyperintensity (1/13, 7.7{\%}) and optic chiasmal hyperintensity (3/13, 23.0{\%}). Seven suspected ON patients demonstrated intracranial multifocal patchy contrast enhancement (7/13, 53.8{\%}). Diagnosis of orbital cellulitis was made in 12/92 (13.0{\%}) patients. Conclusions Orbital neoplasia was the most common pathologic condition detected. Essential Roentgen characteristics are helpful when diagnosing pathologic processes and providing prognoses in cases of orbital or intracranial disease. Magnetic resonance imaging comprises an important diagnostic component in cases of suspected ON. Emerging contrast and functional MRI techniques as well as SI data may increase our ability to characterize disease processes.",
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AB - Objective To review the distribution of orbital and intracranial disease in canine and feline patients undergoing magnetic resonance imaging (MRI) following referral to a veterinary ophthalmologist and to correlate results of MRI with pathologic conditions including neoplasia, suspected optic neuritis (ON) and orbital cellulitis. Recognized and emerging imaging techniques are reviewed. Procedure Medical records of 79 canine and 13 feline patients were reviewed. Results Neoplasia was diagnosed in 53/92 (57.6%) of patients. The most prevalent types of neoplasia were carcinoma (16/53, 30.1%), sarcoma (11/53, 20.8%), lymphoma (8/53, 15.1%) and presumptive meningioma (9/53, 17.0%). Carcinomas and sarcomas were characterized by bony lysis and intracranial/sinonasal extension. Lymphoma was generally unilateral, less invasive and originated from the ventromedial orbit. Intracranial masses representing presumptive meningiomas frequently exhibited a 'dural tail' sign. Diagnosis of suspected ON was made in 13 of 92 (14.1%) patients. Results of MRI in patients with suspected ON included unilateral optic nerve hyperintensity (3/13, 23.0%), bilateral optic nerve hyperintensity (1/13, 7.7%) and optic chiasmal hyperintensity (3/13, 23.0%). Seven suspected ON patients demonstrated intracranial multifocal patchy contrast enhancement (7/13, 53.8%). Diagnosis of orbital cellulitis was made in 12/92 (13.0%) patients. Conclusions Orbital neoplasia was the most common pathologic condition detected. Essential Roentgen characteristics are helpful when diagnosing pathologic processes and providing prognoses in cases of orbital or intracranial disease. Magnetic resonance imaging comprises an important diagnostic component in cases of suspected ON. Emerging contrast and functional MRI techniques as well as SI data may increase our ability to characterize disease processes.

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