title: Osteochondrosis, Synovial Fossae, and Articular Indentations in the Talus and Distal Tibia of Growing Domestic Pigs and Wild Boars.
abstract: Articular osteochondrosis (OC) often develops in typical locations within joints, and the characterization of OC distribution in the pig tarsus is incomplete. Prevalence of OC is high in domestic pigs but is presumed to be low in wild boars. Postmortem and computed tomography (CT) examinations of the talus and distal tibia from 40 domestic pigs and 39 wild boars were evaluated for the locations and frequencies of OC, synovial fossae, and other articular indentations, and frequency distribution maps were made. All domestic pigs but only 5 wild boars (13%) had OC on the talus. In domestic pigs, OC consistently affected the axial aspect of the medial trochlea tali in 11 (28%) joints and the distomedial talus in 26 (65%) joints. In wild boars, all OC lesions consistently affected the distomedial talus. On the articular surface of the distal tibia, all domestic pigs and 34 wild boars (87%) had synovial fossae and 7 domestic pigs (18%) had superficial cartilage fibrillation opposite an OC lesion (kissing lesion). Other articular indentations occurred in the intertrochlear groove of the talus in all domestic pigs and 13 wild boars (33%) and were less common on the trochlea tali. The prevalence of tarsal OC in wild boars is low. In domestic pigs and wild boars, OC is typically localized to the distomedial talus and in domestic pigs also to the medial trochlea tali. Further investigations into the reasons for the low OC prevalence in wild boars may help in developing strategies to reduce OC incidence in domestic pigs.
authors.affiliation: 1 Section of Pathology, Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden.
authors.forename: P E
authors.initials: PE
authors.lastname: Etterlin
authors.affiliation: 1 Section of Pathology, Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Ekman
authors.affiliation: 3 Uppsala University, Uppsala, Sweden.
authors.forename: R
authors.initials: R
authors.lastname: Strand
authors.affiliation: 4 Norwegian University of Life Sciences, Oslo, Norway.
authors.forename: K
authors.initials: K
authors.lastname: Olstad
authors.affiliation: 2 Swedish University of Agricultural Sciences, Uppsala, Sweden.
authors.forename: C J
authors.initials: CJ
authors.lastname: Ley
mesh_terms: D000818:Animals; D005260:Female; D008297:Male; D055034:Osteochondrosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D034421:Sus scrofa / Q000254:growth & development; D013552:Swine / Q000254:growth & development; D013553:Swine Diseases / Q000000981:diagnostic imaging / Q000473:pathology*; D013583:Synovial Membrane / Q000473:pathology; D013628:Talus / Q000000981:diagnostic imaging / Q000473:pathology*; D013977:Tibia / Q000000981:diagnostic imaging / Q000473:pathology*; D014057:Tomography, X-Ray Computed / Q000662:veterinary
keywords: computed tomography; domestic pigs; frequency maps; hock; osteochondritis; osteochondrosis; synovial fossae; wild boars