Radiographic development of osteochondral abnormalities, in the hock and stifle of Dutch Warmblood foals, from age 1 to 11 months

Abstract

2 3 6 8 n = 43; 86 joints.months. Subsequent progression was usually followed by regression and resolution, the appearance returned in most cases to normal at age 8 months. At 5 months, 20% of the stifles were abnormal, but at 11 months this percentage had decreased to 3%. Normal and abnormal appearances were permanent from age 8 months.Osteochondrosis of the main predilection sites in the hock and stifle develops very early in life. The majority of the lesions were temporary, the 'age of no return' was 5 months for the hock and 8 months for the stifle.

An Update on the Pathogenesis of Osteochondrosis

“…77 Because of their generalized distribution and gradual disappearance, dimples and tubes were clearly distinguishable from the focal, uniformly radiolucent defects that corresponded to lesions of ischemic chondronecrosis within the ossification front (osteochondrosis manifesta) in histological sections. 77 Longitudinal radiographic studies 16,20 had documented that a proportion of osteochondrosis lesions undergo spontaneous resolution, but at the time, it was not known how this occurred. Ischemic chondronecrosis is associated with secondary repair responses in growth cartilage that include proliferation of adjacent viable chondrocytes and cartilage canal vessels (Fig.…”

“…114,115 This is most likely due to a high rate of false-negative diagnosis, which can occur if an animal is screened too early, before lesions have developed, or too late, after lesions have resolved. 16,20 To determine when lesions developed and resolved in 6 joints (the shoulder, elbow, carpus, hip, stifle, and tarsus), 17 of the above-mentioned pigs and 1 additional pig were serially CT-scanned from 2 to 8 times each at biweekly intervals from 70 to 180 days of age and 20 to 128 kg body weight, generating a total of 113 CT scans. 81 Within the hind-and forelimbs, the incidence of focal, uniformly radiolucent defects in the ossification front was highest in the stifle (n ¼ 321) and the elbow (n ¼ 110) joints, respectively.…”

Associations between osteochondrosis and conformation and locomotive characteristics in pigs1

“…Thus, effects of a certain leg conformation on OC may not be limited to only the legs in which the conformation is found. However, CLC can easily be assessed throughout a pigs life at several time points, whereas OC can usually only be assessed through radiographic monitoring Ebeid et al, 1998;Dik et al, 1999), only showing subchondral bone changes, or once after sacrificing the animal. Consequently, it is difficult to conclude whether OC lesions were present before or after the onset of CLC abnormalities.…”

Ocorrência da osteocondrite dissecante na articulação tibiotársica em equinos da raça Brasileiro de Hipismo por meio da radiografia digital

“…Estudos radiográficos mensais em potros bem jovens demonstraram OCD nas articulações tibiotársicas e femorotibiopatelares, em linhagens holandesas, podendo algumas delas regredir ou permanecer inalteradas por volta do quinto mês de vida, sendo esta considerada idade limite (Dick et al 1999).…”

“…Fatores genéticos (Van Weeren, 2006;Wittwer et al, 2006;Dierks et al, 2007;Wittwer et al 2009), biomecânicos (McIlwraight, 1987Jeffcott, 1991;Van Weeren, 2006; Outro aspecto a ser considerado é o fato de ser muito precoce nos equinos o aparecimento de alterações da OCD (Dick et al, 1999;Olstad et al, 2007;Lecocq et al, 2008). Isso sugere a criação de um modelo de triagem que poderia ser estimulado aos criadores brasileiros, com aquisições de imagens sequenciais nos potros para melhor entendimento da evolução da OCD no Brasil, associado a outros métodos de detecção da doença, sendo um estudo multidisciplinar mais sensível e com maior grau de êxito na detecção e controle da OCD.…”