E-ISSN 2218-6050 | ISSN 2226-4485
 
2025, Vol: 15, Issue: 9
15 / 9Current Issue ArchiveAims and ScopeAbstracting & IndexingMost Accessed ArticlesMost Downloaded ArticlesMost Cited Articles
Required files to be uploaded

OVJ Manuscript Submissio Form

Case Report


Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report

Shinya Mizutani, Saki Kageyama, Yoshimichi Goda, Yasuhiko Okamura, Ikki Mitsui, Natsuki Akashi, Akihiro Ohnishi, Teppei Kanda, Taketoshi Asanuma.


Abstract
Background:
Canine thymoma (CT) is the most common neoplastic disease of the cranial intrathoracic cavity. Reports of video-assisted thoracoscopic surgery-thymectomy (VATS-T) in dogs are increasing, but the surgical indication criteria remain unclear. This report highlights the value of a new criterion called the thymoma volume to cranial intrathoracic volume ratio (T/CI ratio) for evaluating the feasibility of VATS-T.

Case Description:
A neutered 9-year-old Papillon weighing 3.5 kg had a mass of approximately 20 mm in the cranial intrathoracic cavity. The dog was in good general condition and had no clinical symptoms. Computed tomography revealed a solitary mass with clear boundaries and weak contrast enhancement. The T/CI ratio obtained from CT examination was 2.4%. The dog underwent thoracoscopic tumor resection. Pathological examination revealed that the tumor was a thymoma. The dog was discharged without any postoperative complications. The T/CI ratios obtained from CT data of dogs of the same breed and weight, which ranged from 1.1% to 4.1%, were calculated based on previous reports that measured the volume of thymomas.

Conclusion:
The T/CI ratio may serve as a new objective criterion for evaluating the relationship between cranial intrathoracic volume and thymoma volume for VATS-T, regardless of dog body size. Although this case demonstrates a promising correlation between the CT-based T/CI ratio and the feasibility of VATS-T, the findings are limited to a single case. Further studies involving a larger number of patients are necessary to validate this observation.

Key words: Computed tomography; Dog; Thoracoscopy; Video-assisted thoracoscopic surgery; Thymoma.


 
ARTICLE TOOLS
Abstract
PDF Fulltext
How to cite this articleHow to cite this article
Citation Tools
Related Records
 Articles by Shinya Mizutani
Articles by Saki Kageyama
Articles by Yoshimichi Goda
Articles by Yasuhiko Okamura
Articles by Ikki Mitsui
Articles by Natsuki Akashi
Articles by Akihiro Ohnishi
Articles by Teppei Kanda
Articles by Taketoshi Asanuma
on Google
on Google Scholar


How to Cite this Article
Pubmed Style

Mizutani S, Kageyama S, Goda Y, Okamura Y, Mitsui I, Akashi N, Ohnishi A, Kanda T, Asanuma T. Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report. Open Vet. J.. 2025; 15(9): 4744-4749. doi:10.5455/OVJ.2025.v15.i9.79

Web Style

Mizutani S, Kageyama S, Goda Y, Okamura Y, Mitsui I, Akashi N, Ohnishi A, Kanda T, Asanuma T. Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report. https://www.openveterinaryjournal.com/?mno=268892 [Access: October 06, 2025]. doi:10.5455/OVJ.2025.v15.i9.79

AMA (American Medical Association) Style

Mizutani S, Kageyama S, Goda Y, Okamura Y, Mitsui I, Akashi N, Ohnishi A, Kanda T, Asanuma T. Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report. Open Vet. J.. 2025; 15(9): 4744-4749. doi:10.5455/OVJ.2025.v15.i9.79


Vancouver/ICMJE Style

Mizutani S, Kageyama S, Goda Y, Okamura Y, Mitsui I, Akashi N, Ohnishi A, Kanda T, Asanuma T. Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report. Open Vet. J.. (2025), [cited October 06, 2025]; 15(9): 4744-4749. doi:10.5455/OVJ.2025.v15.i9.79


Harvard Style

Mizutani, S., Kageyama, . S., Goda, . Y., Okamura, . Y., Mitsui, . I., Akashi, . N., Ohnishi, . A., Kanda, . T. & Asanuma, . T. (2025) Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report. Open Vet. J., 15 (9), 4744-4749. doi:10.5455/OVJ.2025.v15.i9.79


Turabian Style

Mizutani, Shinya, Saki Kageyama, Yoshimichi Goda, Yasuhiko Okamura, Ikki Mitsui, Natsuki Akashi, Akihiro Ohnishi, Teppei Kanda, and Taketoshi Asanuma. 2025. Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report. Open Veterinary Journal, 15 (9), 4744-4749. doi:10.5455/OVJ.2025.v15.i9.79


Chicago Style

Mizutani, Shinya, Saki Kageyama, Yoshimichi Goda, Yasuhiko Okamura, Ikki Mitsui, Natsuki Akashi, Akihiro Ohnishi, Teppei Kanda, and Taketoshi Asanuma. "Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report." Open Veterinary Journal 15 (2025), 4744-4749. doi:10.5455/OVJ.2025.v15.i9.79


MLA (The Modern Language Association) Style

Mizutani, Shinya, Saki Kageyama, Yoshimichi Goda, Yasuhiko Okamura, Ikki Mitsui, Natsuki Akashi, Akihiro Ohnishi, Teppei Kanda, and Taketoshi Asanuma. "Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report." Open Veterinary Journal 15.9 (2025), 4744-4749. Print. doi:10.5455/OVJ.2025.v15.i9.79


APA (American Psychological Association) Style

Mizutani, S., Kageyama, . S., Goda, . Y., Okamura, . Y., Mitsui, . I., Akashi, . N., Ohnishi, . A., Kanda, . T. & Asanuma, . T. (2025) Computed tomography-based thymoma-to-cranial intrathoracic volume ratio predicts the feasibility of video-assisted thoracoscopic surgery in a small dog: A case report. Open Veterinary Journal, 15 (9), 4744-4749. doi:10.5455/OVJ.2025.v15.i9.79


Author LoginReviewer LoginAbout PublisherPublication Ethics and Publication Malpractice StatementConflict of Interest PolicyPlagiarism PolicyTerms of UseLicense InformationCopyright Information

About Open Veterinary Journal

Open Veterinary Journal provides a fast track coupled with high quality peer review process for original research articles, review articles, short communi ... Read more.



For best results, please use Internet Explorer or Google Chrome.

Contact Information

All correspondence should be addressed to:

Prof. Ibrahim Eldaghayes: Owner, Founder and Editor-in-Chief

Open Veterinary Journal


Faculty of Veterinary Medicine, University of Tripoli

P.O. Box 13662, Tripoli, Libya

and


Eldaghayes Publisher

www.eldaghayes.com 

Email: ibrahim.eldaghayes@vetmed.edu.ly