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Martin TW, Griffin L. Prospective pilot study utilizing changes in quantitative values obtained on serial fluorine-18 fluorodeoxyglucose ( 18F-FDG) positron emission tomography-computed tomography (PET/CT) in dogs with appendicular osteosarcoma before and after stereotactic body radiation therapy (SBRT) and carboplatin chemotherapy to assess for prediction of survival and therapeutic effectiveness. Vet Radiol Ultrasound 2024; 65:408-416. [PMID: 38655687 DOI: 10.1111/vru.13361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/24/2024] [Accepted: 03/10/2024] [Indexed: 04/26/2024] Open
Abstract
Serial fluorine 18 fluorodeoxyglucose (18F-FDG) positron emission tomography-CT (PET/CT) is commonly used in human oncology to prognosticate and evaluate for therapeutic effectiveness. In this pilot study, dogs with naturally occurring appendicular osteosarcoma were evaluated with serial 18F-FDG PET/CT in an attempt to assess for response to therapy, prognostic factors, and appropriateness of imaging intervals. Fourteen dogs were enrolled in the trial. All dogs had the initial 18F-FDG PET/CT (PET1), with nine dogs having their end-of-therapy 18F-FDG PET/CT (EoT PET) 3 months after stereotactic body radiation therapy (SBRT) to the primary tumor. The median percent change from the PET1 to the EoT PET for the standard uptake value maximum (SUVmax%) was -58% (range: -17 to -88%), metabolic tumor volume (MTV%) was -99.8% (range: -65 to -100%), and total lesion glycolysis (TLG%) was -99.8% (range: -75 to -100%), all of which were significant (P < .05, <.05, and <.05, respectively). On evaluation, it was found that volumes of GTV and CTV were significant for survival (P < .05 and <.05), MTV1, TLG1, and SUVmax on the EoT PET (SUVmaxEoT) were predictive of metastasis (P < .05), and the SUVmax% was significantly correlated to the time to first event (P < .05). Based on this data, serial 18F-FDG PET/CT performed 3 months after SBRT can show a significant reduction in avidity, and the quantitative data collected may help predict metastatic disease in canine appendicular osteosarcoma.
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Affiliation(s)
- Tiffany W Martin
- Department of Clinical Sciences, Flint Animal Cancer Center, Colorado State University, Fort Collins, Colorado, USA
| | - Lynn Griffin
- VCA Canada Central Victoria Veterinary Hospital, Victoria, British Columbia, Canada
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Chen CL, Cook MR, Brown ME, Lumbrezer-Johnson S, Hostnik ET, Lapsley JM, Lerche P, Wavreille VA, Menendez MI, Knopp MV, Linn SC, Premanandan C, Selmic LE. Case Report: Use of PET/CT to Guide Treatment in a Cat With Presentation Consistent With Hodgkin's-Like Lymphoma. Front Vet Sci 2021; 8:619264. [PMID: 33996958 PMCID: PMC8116528 DOI: 10.3389/fvets.2021.619264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 02/24/2021] [Indexed: 11/28/2022] Open
Abstract
An 8-year-old male neutered Domestic Long Hair cat was presented for a cervical swelling that was suspected to be an enlarged left retropharyngeal lymph node. In the absence of other lymphadenopathy, this was initially suspected to be Hodgkin's-like lymphoma. A positron emission tomography–computed tomography (PET/CT) scan was performed using 2-deoxy-2-[18F]-fluorodeoxyglucose (18F-FDG) to assess for evidence of disease in other locations to guide treatment. Multifocal increased radiopharmaceutical uptake was identified, indicating disease in multiple organs. High-grade lymphoma was confirmed on tissue biopsy. As such, systemic cytotoxic chemotherapy was recommended instead of lymph node extirpation surgery. The cat received a modified CHOP chemotherapy protocol and attained a temporary partial remission. After 2 months of treatment, the cat stopped responding to chemotherapy and was eventually euthanized due to a relapse of disease and decreased quality of life. This case describes the utility of PET/CT to guide treatment in a cat with a presentation consistent with Hodgkin's-like lymphoma.
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Affiliation(s)
- Carolyn L Chen
- Veterinary Medical Center, The Ohio State University, Columbus, OH, United States
| | - Matthew R Cook
- Veterinary Medical Center, The Ohio State University, Columbus, OH, United States
| | - Megan E Brown
- Veterinary Medical Center, The Ohio State University, Columbus, OH, United States
| | | | - Eric T Hostnik
- Veterinary Medical Center, The Ohio State University, Columbus, OH, United States
| | - Janis M Lapsley
- Veterinary Medical Center, The Ohio State University, Columbus, OH, United States
| | - Phillip Lerche
- Veterinary Medical Center, The Ohio State University, Columbus, OH, United States
| | | | - Maria I Menendez
- Department of Radiology, The Wright Center of Innovation in Biomedical Imaging, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Michael V Knopp
- Department of Radiology, The Wright Center of Innovation in Biomedical Imaging, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Sarah C Linn
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Christopher Premanandan
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Laura E Selmic
- Veterinary Medical Center, The Ohio State University, Columbus, OH, United States
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Nerschbach V, Eberle N, Joetzke AE, Hoeinghaus R, Hungerbuehler S, Mischke R, Nolte I, Betz D. Splenic and hepatic ultrasound and cytology in canine lymphoma: effects of findings on stage migration and assessment of prognosis. Vet Comp Oncol 2014; 14 Suppl 1:82-94. [DOI: 10.1111/vco.12127] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 09/21/2014] [Accepted: 10/19/2014] [Indexed: 12/18/2022]
Affiliation(s)
- V. Nerschbach
- Small Animal Hospital of the University of Veterinary Medicine; Hannover Germany
| | - N. Eberle
- Small Animal Hospital of the University of Veterinary Medicine; Hannover Germany
| | - A. E. Joetzke
- Small Animal Hospital of the University of Veterinary Medicine; Hannover Germany
| | - R. Hoeinghaus
- Small Animal Hospital of the University of Veterinary Medicine; Hannover Germany
| | - S. Hungerbuehler
- Small Animal Hospital of the University of Veterinary Medicine; Hannover Germany
| | - R. Mischke
- Small Animal Hospital of the University of Veterinary Medicine; Hannover Germany
| | - I. Nolte
- Small Animal Hospital of the University of Veterinary Medicine; Hannover Germany
| | - D. Betz
- Small Animal Hospital of the University of Veterinary Medicine; Hannover Germany
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Abstract
Veterinarians have gained increasing access to positron emission tomography (PET and PET/CT) imaging facilities, allowing them to use this powerful molecular imaging technique for clinical and research applications. SPECT is currently being used more in Europe than in the United States and has been shown to be useful in veterinary oncology and in the evaluation of orthopedic diseases. SPECT brain perfusion and receptor imaging is used to investigate behavioral disorders in animals that have interesting similarities to human psychiatric disorders. This article provides an overview of the potential applications of PET and SPECT. The use of commercially available and investigational PET radiopharmaceuticals in the management of veterinary disease has been discussed. To date, most of the work in this field has utilized the commercially available PET tracer, (18)F-fluorodeoxyglucose for oncologic imaging. Normal biodistribution studies in several companion animal species (cats, dogs, and birds) have been published to assist in lesion detection and interpretation for veterinary radiologists and clinicians. Studies evaluating other (18)F-labeled tracers for research applications are underway at several institutions and companion animal models of human diseases are being increasingly recognized for their value in biomarker and therapy development. Although PET and SPECT technologies are in their infancy for clinical veterinary medicine, increasing access to and interest in these applications and other molecular imaging techniques has led to a greater knowledge and collective body of expertise for veterinarians worldwide. Initiation and fostering of physician-veterinarian collaborations are key components to the forward movement of this field.
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Affiliation(s)
- Amy K LeBlanc
- Department of Small Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Veterinary Teaching Hospital, Knoxville, TN.
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Kim J, Kwon SY, Cena R, Park S, Oh J, Oui H, Cho KO, Min JJ, Choi J. CT and PET-CT of a dog with multiple pulmonary adenocarcinoma. J Vet Med Sci 2014; 76:615-20. [PMID: 24389742 PMCID: PMC4064154 DOI: 10.1292/jvms.13-0434] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 10-year-old, intact female
Yorkshire terrier had multiple pulmonary nodules on thoracic radiography and
ultrasonography with no lesions elsewhere. Computed tomography (CT) and positron emission
tomography and computed tomography (PET-CT) using 18F-fluorodeoxyglucose (FDG) were
performed to identify metastasis and undetected primary tumors. On CT examination,
pulmonary nodules had a hypoattenuating center with thin peripheral enhancement,
suggesting ischemic or necrotizing lesion. In PET-CT at 47 min after intravenous injection
of 11.1 MBq/kg of FDG, the maximum standardized uptake value of each pulmonary nodule was
about from 3.8 to 6.4. There were no abnormal lesions except for four pulmonary nodules on
the CT and PET-CT. Primary lung tumor was tentatively diagnosed, and palliative therapy
using 2 mg/kg tramadol and 2.2 mg/kg carprofen twice per day was applied. After the dog’s
euthanasia due to deteriorated clinical signs and poor prognosis, undifferentiated
pulmonary adenocarcinoma was diagnosed through histopathologic and immunochemistry
examination. To the best of the authors’ knowledge, this is the first study of CT and
PET-CT features of canine pulmonary adenocarcinoma. In this case, multiple pulmonary
adenocarcinoma could be determined on the basis of FDG PET-CT through screening the
obvious distant metastasis and/or lymph node invasions and excluding unknown primary
tumors.
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Affiliation(s)
- Jisun Kim
- College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
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LeBlanc AK, Morandi F. Invited review--Off-site PET imaging programs: challenges and opportunities. Vet Radiol Ultrasound 2013; 55:109-12. [PMID: 24102994 DOI: 10.1111/vru.12103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 07/21/2013] [Indexed: 11/29/2022] Open
Abstract
Veterinarians are gaining interest in and access to Position Emission Tomography (PET and PET/CT) imaging for both clinical and research applications. This manuscript provides an overview of how veterinarians may approach the use of off-site PET and PET/CT scanners already in use for human medical imaging in order to gain access to this technology without direct investment in costly equipment and infrastructure. An overview of general procedures, animal transport, and radiation safety considerations is offered along with references to key regulatory statutes that may apply to the operation of PET imaging facilities in individual states.
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Affiliation(s)
- Amy K LeBlanc
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, The University of Tennessee, Knoxville, TN, 37996
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Beukers M, Grosso FV, Voorhout G. COMPUTED TOMOGRAPHIC CHARACTERISTICS OF PRESUMED NORMAL CANINE ABDOMINAL LYMPH NODES. Vet Radiol Ultrasound 2013; 54:610-7. [DOI: 10.1111/vru.12075] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 05/18/2013] [Indexed: 12/19/2022] Open
Affiliation(s)
- Martijn Beukers
- Division of Diagnostic Imaging; Faculty of Veterinary Medicine, Utrecht University; Yalelaan 10, NL-3508 TD; Utrecht; The Netherlands
| | - Federico Vilaplana Grosso
- Division of Diagnostic Imaging; Faculty of Veterinary Medicine, Utrecht University; Yalelaan 10, NL-3508 TD; Utrecht; The Netherlands
| | - George Voorhout
- Division of Diagnostic Imaging; Faculty of Veterinary Medicine, Utrecht University; Yalelaan 10, NL-3508 TD; Utrecht; The Netherlands
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