Computed tomographic development of physeal osteochondrosis in pigs

Abstract Background Articular osteochondrosis follows a dynamic development pattern. Lesions arise, in incidence peaks compatible with failure of cartilage canal vessels during incorporation into bone, and can also resolve. Lesions that resolve before examination at a single time point will constitu...

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Main Authors: Kristin Olstad, Bjørn Wormstrand, Jørgen Kongsro, Eli Grindflek
Format: Article
Language:English
Published: BMC 2019-12-01
Series:BMC Veterinary Research
Subjects:
Online Access:https://doi.org/10.1186/s12917-019-2163-7
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spelling doaj-8a5daa0fccb847239ce0c7c35697bb942020-12-20T12:11:36ZengBMCBMC Veterinary Research1746-61482019-12-0115111410.1186/s12917-019-2163-7Computed tomographic development of physeal osteochondrosis in pigsKristin Olstad0Bjørn Wormstrand1Jørgen Kongsro2Eli Grindflek3Faculty of Veterinary Medicine, Department of Companion Animal Clinical Sciences, Equine Section, Norwegian University of Life SciencesFaculty of Veterinary Medicine, Department of Companion Animal Clinical Sciences, Equine Section, Norwegian University of Life SciencesNorsvin SANorsvin SAAbstract Background Articular osteochondrosis follows a dynamic development pattern. Lesions arise, in incidence peaks compatible with failure of cartilage canal vessels during incorporation into bone, and can also resolve. Lesions that resolve before examination at a single time point will constitute false-negative diagnoses. The aim of the study was to identify physeal osteochondrosis lesions in pigs and monitor their development by computed tomography (CT), to determine if they follow a similar dynamic development pattern to articular osteochondrosis. Results Thirteen physes were evaluated bilaterally in up to eight biweekly CT scans from 18 male Landrace pigs age 70–180 days (total: 112 scans), generating 2912 scores. There were 1754 (60%) lesion-negative scores and 1158 (40%) lesion-positive scores. Positive scores comprised 138 lesions present at the start and 235 lesions that developed during the study, from 4 to 32 lesions per physis (median: 15 lesions). There were 1–2 peaks in the incidence curves for 12/13 examined physes, the exception being the proximal humerus. Positive scores also included 785 times that lesions persisted, from 1.3–4.8 examination intervals per lesion (median: 2.8 intervals). Negative scores included 190 times that lesions resolved, from 19 to 100% of lesions per physis (median: 65%). Lesions resolved by filling with bone from marginal sclerosis and reparative ossification centres. In the distal scapula and distal fibula, perichondrial new bone formation occurred that led to permanent enlargement of physeal regions. Angular limb deformity was not identified in any pig. Conclusions Physeal osteochondrosis followed a similar dynamic development pattern to articular osteochondrosis. There were peaks in the incidence curves, compatible with failure of vessels during incorporation into bone. In some physes, osteochondrosis led to permanent enlargement, potentially relevant for decubital ulcers. The relationship between physeal osteochondrosis and angular limb deformity must be examined further in pigs over 6 months old in future.https://doi.org/10.1186/s12917-019-2163-7Growth plateHelical computed tomographyLimb deformitiesLongitudinal studiesOsteochondrosisPhysis
collection DOAJ
language English
format Article
sources DOAJ
author Kristin Olstad
Bjørn Wormstrand
Jørgen Kongsro
Eli Grindflek
spellingShingle Kristin Olstad
Bjørn Wormstrand
Jørgen Kongsro
Eli Grindflek
Computed tomographic development of physeal osteochondrosis in pigs
BMC Veterinary Research
Growth plate
Helical computed tomography
Limb deformities
Longitudinal studies
Osteochondrosis
Physis
author_facet Kristin Olstad
Bjørn Wormstrand
Jørgen Kongsro
Eli Grindflek
author_sort Kristin Olstad
title Computed tomographic development of physeal osteochondrosis in pigs
title_short Computed tomographic development of physeal osteochondrosis in pigs
title_full Computed tomographic development of physeal osteochondrosis in pigs
title_fullStr Computed tomographic development of physeal osteochondrosis in pigs
title_full_unstemmed Computed tomographic development of physeal osteochondrosis in pigs
title_sort computed tomographic development of physeal osteochondrosis in pigs
publisher BMC
series BMC Veterinary Research
issn 1746-6148
publishDate 2019-12-01
description Abstract Background Articular osteochondrosis follows a dynamic development pattern. Lesions arise, in incidence peaks compatible with failure of cartilage canal vessels during incorporation into bone, and can also resolve. Lesions that resolve before examination at a single time point will constitute false-negative diagnoses. The aim of the study was to identify physeal osteochondrosis lesions in pigs and monitor their development by computed tomography (CT), to determine if they follow a similar dynamic development pattern to articular osteochondrosis. Results Thirteen physes were evaluated bilaterally in up to eight biweekly CT scans from 18 male Landrace pigs age 70–180 days (total: 112 scans), generating 2912 scores. There were 1754 (60%) lesion-negative scores and 1158 (40%) lesion-positive scores. Positive scores comprised 138 lesions present at the start and 235 lesions that developed during the study, from 4 to 32 lesions per physis (median: 15 lesions). There were 1–2 peaks in the incidence curves for 12/13 examined physes, the exception being the proximal humerus. Positive scores also included 785 times that lesions persisted, from 1.3–4.8 examination intervals per lesion (median: 2.8 intervals). Negative scores included 190 times that lesions resolved, from 19 to 100% of lesions per physis (median: 65%). Lesions resolved by filling with bone from marginal sclerosis and reparative ossification centres. In the distal scapula and distal fibula, perichondrial new bone formation occurred that led to permanent enlargement of physeal regions. Angular limb deformity was not identified in any pig. Conclusions Physeal osteochondrosis followed a similar dynamic development pattern to articular osteochondrosis. There were peaks in the incidence curves, compatible with failure of vessels during incorporation into bone. In some physes, osteochondrosis led to permanent enlargement, potentially relevant for decubital ulcers. The relationship between physeal osteochondrosis and angular limb deformity must be examined further in pigs over 6 months old in future.
topic Growth plate
Helical computed tomography
Limb deformities
Longitudinal studies
Osteochondrosis
Physis
url https://doi.org/10.1186/s12917-019-2163-7
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