Trauma-induced exostosis of multiple suture lines causing partial bilateral nasolacrimal duct obstruction in a 7-year-old Thoroughbred mare.
Abstract: A definitive diagnosis of extensive suture line exostoses affecting the nasofrontal, nasolacrimal, nasomaxillary, frontolacrimal, lacrimozygomatic and lacrimomaxillary suture lines in a 7-year-old Thoroughbred mare with chronic bilateral epiphora and facial deformation was achieved using standing computed tomography (CT) examinations. Positive contrast dacryocystorhinography using CT revealed partial bilateral obstruction of the nasolacrimal ducts. Minimally displaced depression fractures of the right nasal bone, the right maxillary bone and right frontal bone were also demonstrated. The cosmetic appearance of the periosteal reaction associated with the suture line exostosis and epiphora significantly improved within 3 months of diagnosis and treatment.
Publication Date: 2019-09-26 PubMed ID: 31588759PubMed Central: PMC6783641DOI: 10.4102/jsava.v90i0.1764Google Scholar: Lookup
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Summary
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The following study demonstrates the use of standing computed tomography to diagnose a rare case of cranial bone deformations (exostoses) along various suture lines in a 7-year-old Thoroughbred mare. These exostoses caused partial blockage in the mare’s tear ducts, but after diagnosis and treatment, improvements were noted in both tear duct function and facial appearance.
Diagnosis and Investigation
- The horse in this study, a Thoroughbred mare, was presenting with chronic tear flow issues and facial deformations.
- A high-tech imaging technique, standing computed tomography (CT) scans, was employed for diagnosis purposes and help find the root cause of her symptoms.
- Through CT scans, extensive exostoses, which refers to abnormal bone growth, affecting multiple cranial suture lines including nasofrontal, nasolacrimal, nasomaxillary, frontolacrimal, lacrimozygomatic and lacrimomaxillary were identified.
- Further, to assess the tear duct function, a positive contrast dacryocystorhinography – an imaging procedure that involves injecting a radiopaque contrast material into the nasolacrimal duct – was carried out using CT. This study revealed the presence of a partial blockage in both the horse’s nasolacrimal ducts.
- Additional findings included minimally displaced fractures in different cranial bones, specifically, the right nasal bone, the right maxillary bone and the right frontal bone.
Outcome and Conclusion
- Following diagnosis, suitable treatment was provided for the mare’s condition.
- Positive results were noted after a period of three months – significant improvements were observed in the cosmetic appearance of the periosteal reaction (inflammatory response of the outer layer of bone) related to the suture line exostosis.
- There was also a considerable improvement with respect to her chronic tear flow issue (epiphora).
- This case highlights the utility of standing CT examinations in diagnosing complex craniofacial disorders, particularly in large animals where traditional imaging modalities might prove to be challenging.
Cite This Article
APA
Poore LA, Le Roux C, Carstens A.
(2019).
Trauma-induced exostosis of multiple suture lines causing partial bilateral nasolacrimal duct obstruction in a 7-year-old Thoroughbred mare.
J S Afr Vet Assoc, 90, e1-e7.
https://doi.org/10.4102/jsava.v90i0.1764 Publication
Researcher Affiliations
- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria. vicandluke@hotmail.com.
MeSH Terms
- Animals
- Exostoses / etiology
- Exostoses / therapy
- Exostoses / veterinary
- Female
- Fractures, Bone / diagnostic imaging
- Fractures, Bone / etiology
- Fractures, Bone / therapy
- Fractures, Bone / veterinary
- Head Injuries, Closed / complications
- Head Injuries, Closed / veterinary
- Horse Diseases / diagnostic imaging
- Horse Diseases / etiology
- Horse Diseases / therapy
- Horses / injuries
- Lacrimal Duct Obstruction / complications
- Lacrimal Duct Obstruction / diagnostic imaging
- Lacrimal Duct Obstruction / veterinary
- Nasolacrimal Duct / injuries
- South Africa
- Treatment Outcome
Conflict of Interest Statement
The authors declare that they have no financial or personal relationships that may have inappropriately influenced them in writing this article.
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Citations
This article has been cited 1 times.- Verwilghen D, Easley J, Zwick T, Uhlhorn M, Grulke S, Simhofer H, Townsend N, Liyou O, Bodeus F, Zani DD, Vlaminck L, Pearce C, Staszyk C, Bienert-Zeit A. Equine Suture Exostosis: A Review of Cases from a Multicenter Retrospective Study. Vet Sci 2022 Jul 17;9(7).
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