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Musso C, Le Boedec K, Gomes E, Cauzinille L. Diagnostic Values of Clinical and Magnetic Resonance Findings in Presumptive Trigeminal Neuropathy: 49 Dogs. J Am Anim Hosp Assoc 2020; 56:106-113. [PMID: 31961212 DOI: 10.5326/jaaha-ms-6997] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The goal of this retrospective, cross-sectional study was to describe the different etiologies of trigeminal neuropathy based on clinical and MRI findings and to evaluate the significance of associated concomitant disorders. MRI studies of 49 dogs with trigeminal neuropathy were blindly reviewed and were classified into the following three groups: neoplasia, neuritis, or idiopathic trigeminal neuropathy (ITN). Thirty-one percent were suspected to have neoplasia (all unilateral), 16% to have neuritis (1 bilateral and 7 unilateral), and 53% to have ITN (4 unilateral and 22 bilateral). Dogs with clinical bilateral trigeminal dysfunction were most likely to have a diagnosis of ITN (predicted probability 95.7%). Unilateral clinical signs were significantly associated with neoplasia or neuritis compared with ITN (P < .001 and P = .002, respectively). Even with marked brainstem neoplastic involvement, central neurological deficits may be absent. Sensory impairment was significantly associated with either neoplasia or neuritis compared with ITN (P = .007 and P = .03, respectively). Ipsilateral noninfectious middle ear effusion was only seen in dogs with neoplasia (33%). Horner's syndrome was present in 12% of all dogs (2 dogs in each group). Dogs with neoplasia were significantly older than dogs with neuritis (P = .02) and ITN (P = .002). JAAHA-MS-6997.
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Affiliation(s)
- Clément Musso
- From Veterinary Hospital Center Frégis, Arcueil, France
| | | | - Eymeric Gomes
- From Veterinary Hospital Center Frégis, Arcueil, France
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Milodowski EJ, Amengual‐Batle P, Beltran E, Gutierrez‐Quintana R, De Decker S. Clinical findings and outcome of dogs with unilateral masticatory muscle atrophy. J Vet Intern Med 2019; 33:735-742. [PMID: 30556930 PMCID: PMC6430959 DOI: 10.1111/jvim.15373] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 11/06/2018] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Little is known about the spectrum of underlying disorders in dogs with unilateral masticatory muscle (MM) atrophy. OBJECTIVES To evaluate the clinical presentation, magnetic resonance imaging (MRI) findings, and outcome of dogs with unilateral MM atrophy. ANIMALS Sixty-three client-owned dogs. METHODS The medical database was retrospectively reviewed for dogs that underwent MRI for evaluation of unilateral MM atrophy. Imaging studies were reviewed and follow-up information was obtained from telephone interviews. RESULTS Presumptive trigeminal nerve sheath tumor (pTNST) was diagnosed in 30 dogs (47.6%); survival time varied from 1 day to 21 months (median, 5 months). Other extra-axial mass lesions were observed in 13 dogs (20.6%); survival time varied from 6 days to 25 months (median, 2.5 months). In 18 dogs (28.6%), no abnormalities were observed on MRI; neurological signs only progressed in 1 dog. Diagnosis had a significant influence on the type of neurological abnormalities, with additional neurological deficits observed in most dogs with pTNST and in all dogs with other extra-axial mass lesions. Diagnosis had a significant effect on euthanasia at the time of diagnosis and likelihood of neurological deterioration. Dogs with mass lesions were more likely to be euthanized or experience neurological deterioration, whereas these outcomes occurred less often in dogs in which no causative lesion could be identified. CONCLUSIONS AND CLINICAL IMPORTANCE Trigeminal nerve sheath tumors should not be considered the only cause of unilateral MM atrophy. Our results illustrate the importance of performing a neurological examination and MRI when evaluating dogs with unilateral MM atrophy.
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Affiliation(s)
- Emily Jayne Milodowski
- Department of Veterinary Clinical Science and Services, Royal Veterinary CollegeUniversity of LondonHatfieldEnglandUnited Kingdom
| | - Pablo Amengual‐Batle
- School of Veterinary Medicine, College of Medical, Veterinary and Life SciencesUniversity of GlasgowGlasgowScotlandUnited Kingdom
| | - Elsa Beltran
- Department of Veterinary Clinical Science and Services, Royal Veterinary CollegeUniversity of LondonHatfieldEnglandUnited Kingdom
| | - Rodrigo Gutierrez‐Quintana
- School of Veterinary Medicine, College of Medical, Veterinary and Life SciencesUniversity of GlasgowGlasgowScotlandUnited Kingdom
| | - Steven De Decker
- Department of Veterinary Clinical Science and Services, Royal Veterinary CollegeUniversity of LondonHatfieldEnglandUnited Kingdom
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3
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Dolera M, Malfassi L, Marcarini S, Mazza G, Carrara N, Pavesi S, Sala M, Finesso S, Urso G. High dose hypofractionated frameless volumetric modulated arc radiotherapy is a feasible method for treating canine trigeminal nerve sheath tumors. Vet Radiol Ultrasound 2018; 59:624-631. [PMID: 29885013 DOI: 10.1111/vru.12637] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 10/18/2017] [Accepted: 10/19/2017] [Indexed: 12/31/2022] Open
Abstract
The aim of this prospective pilot study was to evaluate the feasibility and effectiveness of curative intent high dose hypofractionated frameless volumetric modulated arc radiotherapy for treatment of canine trigeminal peripheral nerve sheath tumors. Client-owned dogs with a presumptive imaging-based diagnosis of trigeminal peripheral nerve sheath tumor were recruited for the study during the period of February 2010 to December 2013. Seven dogs were enrolled and treated with high dose hypofractionated volumetric modulated arc radiotherapy delivered by a 6 MV linear accelerator equipped with a micro-multileaf beam collimator. The plans were computed using a Monte Carlo algorithm with a prescription dose of 37 Gy delivered in five fractions on alternate days. Overall survival was estimated using a Kaplan-Meier curve analysis. Magnetic resonance imaging (MRI) follow-up examinations revealed complete response in one dog, partial response in four dogs, and stable disease in two dogs. Median overall survival was 952 days with a 95% confidence interval of 543-1361 days. Volumetric modulated arc radiotherapy was demonstrated to be feasible and effective for trigeminal peripheral nerve sheath tumor treatment in this sample of dogs. The technique required few sedations and spared organs at risk. Even though larger studies are required, these preliminary results supported the use of high dose hypofractionated volumetric modulated arc radiotherapy as an alternative to other treatment modalities.
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Affiliation(s)
- Mario Dolera
- La Cittadina Fondazione Studi e Ricerche Veterinarie, Lodi, Italy
| | - Luca Malfassi
- La Cittadina Fondazione Studi e Ricerche Veterinarie, Lodi, Italy
| | - Silvia Marcarini
- La Cittadina Fondazione Studi e Ricerche Veterinarie, Lodi, Italy
| | - Giovanni Mazza
- La Cittadina Fondazione Studi e Ricerche Veterinarie, Lodi, Italy
| | - Nancy Carrara
- La Cittadina Fondazione Studi e Ricerche Veterinarie, Lodi, Italy
| | - Simone Pavesi
- La Cittadina Fondazione Studi e Ricerche Veterinarie, Lodi, Italy
| | - Massimo Sala
- La Cittadina Fondazione Studi e Ricerche Veterinarie, Lodi, Italy
| | - Sara Finesso
- La Cittadina Fondazione Studi e Ricerche Veterinarie, Lodi, Italy
| | - Gaetano Urso
- Azienda Ospedaliera della Provincia di Lodi, Lodi, Italy
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Dolera M, Malfassi L, Carrara N, Finesso S, Marcarini S, Mazza G, Pavesi S, Sala M, Urso G. Volumetric Modulated Arc (Radio) Therapy in Pets Treatment: The "La Cittadina Fondazione" Experience. Cancers (Basel) 2018; 10:E30. [PMID: 29364837 PMCID: PMC5836062 DOI: 10.3390/cancers10020030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/29/2017] [Accepted: 01/16/2018] [Indexed: 12/31/2022] Open
Abstract
Volumetric Modulated Arc Therapy (VMAT) is a modern technique, widely used in human radiotherapy, which allows a high dose to be delivered to tumor volumes and low doses to the surrounding organs at risk (OAR). Veterinary clinics takes advantage of this feature due to the small target volumes and distances between the target and the OAR. Sparing the OAR permits dose escalation, and hypofractionation regimens reduce the number of treatment sessions with a simpler manageability in the veterinary field. Multimodal volumes definition is mandatory for the small volumes involved and a positioning device precisely reproducible with a setup confirmation is needed before each session for avoiding missing the target. Additionally, the elaborate treatment plan must pursue hard constraints and objectives, and its feasibility must be evaluated with a per patient quality control. The aim of this work is to report results with regard to brain meningiomas and gliomas, trigeminal nerve tumors, brachial plexus tumors, adrenal tumors with vascular invasion and rabbit thymomas, in comparison with literature to determine if VMAT is a safe and viable alternative to surgery or chemotherapy alone, or as an adjuvant therapy in pets.
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Affiliation(s)
- Mario Dolera
- La Cittadina Fondazione Studi e Ricerche Veterinarie, 26014 Romanengo, Italy.
| | - Luca Malfassi
- La Cittadina Fondazione Studi e Ricerche Veterinarie, 26014 Romanengo, Italy.
| | - Nancy Carrara
- La Cittadina Fondazione Studi e Ricerche Veterinarie, 26014 Romanengo, Italy.
| | - Sara Finesso
- La Cittadina Fondazione Studi e Ricerche Veterinarie, 26014 Romanengo, Italy.
| | - Silvia Marcarini
- La Cittadina Fondazione Studi e Ricerche Veterinarie, 26014 Romanengo, Italy.
| | - Giovanni Mazza
- La Cittadina Fondazione Studi e Ricerche Veterinarie, 26014 Romanengo, Italy.
| | - Simone Pavesi
- La Cittadina Fondazione Studi e Ricerche Veterinarie, 26014 Romanengo, Italy.
| | - Massimo Sala
- La Cittadina Fondazione Studi e Ricerche Veterinarie, 26014 Romanengo, Italy.
| | - Gaetano Urso
- Azienda Socio Sanitaria Territoriale della provincia di Lodi, 26841 Casalpusterlengo, Italy.
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Coia M, Guevar J, Penderis J, Hammond G. Imaging diagnosis: chronic unilateral trigeminal neuropathy masquerading as a trigeminal peripheral nerve tumour on MRI in a dog. VETERINARY RECORD CASE REPORTS 2016. [DOI: 10.1136/vetreccr-2016-000358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Mark Coia
- School of Veterinary MedicineUniversity of GlasgowGlasgowUK
| | - Julien Guevar
- School of Veterinary MedicineUniversity of GlasgowGlasgowUK
| | | | - Gawain Hammond
- Glasgow UniversitySchool of Veterinary MedicineGlasgowUK
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Hansen KS, Zwingenberger AL, Théon AP, Pfeiffer I, Kent MS. Treatment of MRI-Diagnosed Trigeminal Peripheral Nerve Sheath Tumors by Stereotactic Radiotherapy in Dogs. J Vet Intern Med 2016; 30:1112-20. [PMID: 27279132 PMCID: PMC5089643 DOI: 10.1111/jvim.13970] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 02/19/2016] [Accepted: 04/28/2016] [Indexed: 12/21/2022] Open
Abstract
Background Stereotactic radiotherapy (SRT) is an emerging technique for treating tumors in animals. Objectives To assess the outcome of dogs with suspected intracranial trigeminal nerve peripheral nerve sheath tumors (PNST) treated with SRT. Animals Eight dogs with presumptive PNST. Methods This was a retrospective study of dogs identified by searching UC Davis Veterinary Medical Teaching Hospital medical records for dogs treated with SRT for a presumed PNST. Presumptive diagnosis was based on magnetic resonance imaging. SRT was delivered in 3 dose fractions of 8 Gray (Gy) on consecutive days or every other day to a total dose of 24 Gy. Results Median disease‐specific survival was 745 days (range: 99–1375 days, n = 6). No signs of acute adverse effects of radiation treatment were recorded. Late radiation effects versus tumor progression could not be confirmed histopathologically because of few animals undergoing necropsy. Conclusions and Clinical Importance This study provides preliminary evidence that dogs with PNST benefit from SRT in terms of long‐term survival. The treatment appears to be well tolerated and requires fewer anesthetic events for animals compared to full‐course radiation.
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Affiliation(s)
- K S Hansen
- Department of Surgical and Radiological Sciences, UC Davis School of Veterinary Medicine, Davis, CA
| | - A L Zwingenberger
- Department of Surgical and Radiological Sciences, UC Davis School of Veterinary Medicine, Davis, CA
| | - A P Théon
- Department of Surgical and Radiological Sciences, UC Davis School of Veterinary Medicine, Davis, CA
| | - I Pfeiffer
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN
| | - M S Kent
- Department of Surgical and Radiological Sciences, UC Davis School of Veterinary Medicine, Davis, CA
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PETTIGREW ROGER, RYLANDER HELENA, SCHWARZ TOBIAS. MAGNETIC RESONANCE IMAGING CONTRAST ENHANCEMENT OF THE TRIGEMINAL NERVE IN DOGS WITHOUT EVIDENCE OF TRIGEMINAL NEUROPATHY. Vet Radiol Ultrasound 2009; 50:276-8. [DOI: 10.1111/j.1740-8261.2009.01533.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Schultz RM, Tucker RL, Gavin PR, Bagley R, Saveraid TC, Berry CR. MAGNETIC RESONANCE IMAGING OF ACQUIRED TRIGEMINAL NERVE DISORDERS IN SIX DOGS. Vet Radiol Ultrasound 2007; 48:101-4. [PMID: 17385364 DOI: 10.1111/j.1740-8261.2007.00212.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The medical records and magnetic resonance (MR) images of dogs with an acquired trigeminal nerve disorder were reviewed retrospectively. Trigeminal nerve dysfunction was present in six dogs with histologic confirmation of etiology. A histopathologic diagnosis of neuritis (n=2) or nerve sheath tumor (n=4) was made. Dogs with trigeminal neuritis had diffuse enlargement of the nerve without a mass lesion. These nerves were isointense to brain parenchyma on T1-weighted (T1W) precontrast images and proton-density-weighted (PDW) images and either isointense or hyperintense on T2-weighted (T2W) images. Dogs with a nerve sheath tumor had a solitary or lobulated mass with displacement of adjacent neuropil. Nerve sheath tumors were isointense to the brain parenchyma on T1W, T2W, and PDW images. All trigeminal nerve lesions enhanced following contrast medium administration. Atrophy of the temporalis and masseter muscles, with a characteristic increase in signal intensity on T1W images, were present in all dogs.
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Affiliation(s)
- Ryan M Schultz
- Department of Veterinary Clinical Sciences, Veterinary Teaching Hospital, Washington State University, Pullman, WA 99164, USA
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Polizopoulou ZS, Koutinas AF, Souftas VD, Kaldrymidou E, Kazakos G, Papadopoulos G. Diagnostic Correlation of CT-MRI and Histopathology in 10 Dogs with Brain Neoplasms. ACTA ACUST UNITED AC 2004; 51:226-31. [PMID: 15315701 DOI: 10.1111/j.1439-0442.2004.00633.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ten dogs with primary (n = 8) and metastatic (n = 2) brain tumours were studied in an attempt to evaluate the diagnostic sensitivity of computed tomography (CT) or magnetic resonance imaging (MRI). Of the clinical signs noticed, seizures (seven of 10), behavioural abnormalities and cognition dysfunction (seven of 10), compulsive walking and circling (six of 10), sensorimotor (five of 10) and neuro-opthalmological (two of 10) dysfunction were the most common. In all 10 animals that finally died of the disease or were killed, the histopathological diagnosis that followed necropsy was taken as a golden standard in the CT or MRI prediction of the histological type of brain neoplasms. In every instance, tumour detection, morphology and histological differentiation were possible with the aid of either CT (seven of 10) or MRI (three of 10) imaging especially after contrast enhancement. Only one CT-evaluated dog, diagnosed as meningioma, was found to be astrocytoma on histopathology. Interestingly, a rare case of cerebellar medulloblastoma was correctly identified in MRI scans.
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Affiliation(s)
- Z S Polizopoulou
- Laboratory of Clinical Diagnosis and Clinical Pathology, School of Veterinary Medicine, Aristotle University of Thessaloniki, Stavrou Voutyra 11, 546 27 Thessaloniki, Greece.
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Essman SC, Hoover JP, Bahr RJ, Ritchey JW, Watson C. An intrathoracic malignant peripheral nerve sheath tumor in a dog. Vet Radiol Ultrasound 2002; 43:255-9. [PMID: 12088320 DOI: 10.1111/j.1740-8261.2002.tb00999.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
A 7-year-old, neutered male Labrador Retriever presented for a persistent, productive cough and regurgitation. Radiography, ultrasonography, and computed tomography confirmed a large, smoothly marginated intrathoracic mass causing tracheal compression. The mass was removed via a thoracotomy, and a malignant peripheral nerve sheath tumor, most likely originating from the ventral spinal nerve roots, was confirmed using immunohistochemistry.
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Affiliation(s)
- Stephanie C Essman
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater 74078-2042, USA
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