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Computed tomographic features and surgical treatment of equine mandibular aneurysmal bone cysts with β-tricalcium phosphate in a multicenter case series


Spoormakers, Tijn J; Heim, Corsin; Vermunt, Lian; Fürst, Anton; Rovel, Tibor (2023). Computed tomographic features and surgical treatment of equine mandibular aneurysmal bone cysts with β-tricalcium phosphate in a multicenter case series. Journal of the American Veterinary Medical Association, 261(12):1-9.

Abstract

OBJECTIVE
To describe clinical and imaging features and surgical treatment of equine mandibular aneurysmal bone cysts (ABCs) with β-tricalcium phosphate (TCP).


ANIMALS
3 horses (cases 1, 2, and 3) and 1 pony (case 4) with histologically confirmed ABC.


CLINICAL PRESENTATION
All cases had mandibular swelling with intact adjacent skin. Cases 1 to 3 had a body condition score of 3/5 and case 4 had 2/5 and showed quidding during mastication and, at oral examination, large interdental spaces and loose elements adjacent to the swelling. Radiography or CT was performed in all cases. In cases 1, 3, and 4, an expansile septate cystic space-occupying lesion with mass effect on the adjacent cortices and teeth was seen without compact bone destruction. Case 2 showed a heterogeneous osteolytic mass with multifocal cortical lysis and interruption. Case 4 had severe dental abnormalities of deciduous and precursors of permanent teeth. ABCs were surgically treated and filled with only TCP (case 3) or in combination with autologous bone marrow (cases 1, 2, and 4).


RESULTS
Cases 1 through 3 showed an uneventful reduction in ABC size with increased opacity/attenuation. In case 4, a surgical site infection occurred. After removal of TCP remnants, the ABC healed satisfactorily, but remaining dental abnormalities necessitated dietary adjustments to maintain an acceptable body condition score.


CLINICAL RELEVANCE
Treatment of ABCs with TCP had a favorable outcome and good long-term prognosis. In young specimens, the expansile effect on the development and eruption of neighboring teeth can influence and determine final functionality of the diseased dental quadrant.

Abstract

OBJECTIVE
To describe clinical and imaging features and surgical treatment of equine mandibular aneurysmal bone cysts (ABCs) with β-tricalcium phosphate (TCP).


ANIMALS
3 horses (cases 1, 2, and 3) and 1 pony (case 4) with histologically confirmed ABC.


CLINICAL PRESENTATION
All cases had mandibular swelling with intact adjacent skin. Cases 1 to 3 had a body condition score of 3/5 and case 4 had 2/5 and showed quidding during mastication and, at oral examination, large interdental spaces and loose elements adjacent to the swelling. Radiography or CT was performed in all cases. In cases 1, 3, and 4, an expansile septate cystic space-occupying lesion with mass effect on the adjacent cortices and teeth was seen without compact bone destruction. Case 2 showed a heterogeneous osteolytic mass with multifocal cortical lysis and interruption. Case 4 had severe dental abnormalities of deciduous and precursors of permanent teeth. ABCs were surgically treated and filled with only TCP (case 3) or in combination with autologous bone marrow (cases 1, 2, and 4).


RESULTS
Cases 1 through 3 showed an uneventful reduction in ABC size with increased opacity/attenuation. In case 4, a surgical site infection occurred. After removal of TCP remnants, the ABC healed satisfactorily, but remaining dental abnormalities necessitated dietary adjustments to maintain an acceptable body condition score.


CLINICAL RELEVANCE
Treatment of ABCs with TCP had a favorable outcome and good long-term prognosis. In young specimens, the expansile effect on the development and eruption of neighboring teeth can influence and determine final functionality of the diseased dental quadrant.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Equine Department
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Uncontrolled Keywords:General Veterinary
Language:English
Date:1 December 2023
Deposited On:20 Sep 2023 12:10
Last Modified:29 Jun 2024 01:38
Publisher:American Veterinary Medical Association
ISSN:0003-1488
OA Status:Closed
Publisher DOI:https://doi.org/10.2460/javma.23.03.0137
PubMed ID:37562778