Cherel Y, Wyers M, Evain L
Laboratoire d'Anatomie Pathologique, Ecole Nationale Vétérinaire de Nantes, France.
Zentralbl Veterinarmed A. 1990 Oct;37(9):676-85.
The tibiotarsal bones from 1,084 15-week-old growing commercial male turkeys, half of which clinically lame, were examined for dyschondroplasia. Lesions were a cone of retained cartilage, confined to the postero-medial area of the proximal metaphysis of the tibiotarsus. Dense woven bone was present around the largest lesions associated with thickening of the diaphyseal cortex below the lesion. Length of abnormal cartilage varied from 0.1 cm to 5.3 cm. Width never exceeded 2.9 cm. Half of the affected turkeys showed unilateral localization of dyschondroplastic lesions. The percentage of damaged tibias was 54 per cent and the percentage of affected turkeys was more than 70 per cent. The incidence of dyschondroplasia was the same in lame and clinically healthy turkeys but, on average, lame turkeys exhibited longer lesions than clinically normal birds. The tibias of lame turkeys were more curved than the tibias of healthy ones as well in the anterio-posterior projection as in the latero-medial one. The latero-medial projection of incurvation was correlated with the length of dyschondroplastic lesions.
对1084只15周龄生长中的商品肉用雄性火鸡的胫跗骨进行检查，以确定是否患有软骨发育异常，其中一半有跛行症状。病变表现为保留软骨的锥形，局限于胫跗骨近端干骺端的后内侧区域。在与病变下方骨干皮质增厚相关的最大病变周围存在致密的编织骨。异常软骨的长度从0.1厘米到5.3厘米不等。宽度从未超过2.9厘米。一半受影响的火鸡表现出软骨发育异常病变的单侧定位。受损胫骨的比例为54%，受影响火鸡的比例超过70%。跛行和临床健康火鸡的软骨发育异常发生率相同，但平均而言，跛行火鸡的病变比临床正常的火鸡更长。跛行火鸡的胫骨在前后位和内外侧位投影中都比健康火鸡的胫骨更弯曲。内外侧弯曲投影与软骨发育异常病变的长度相关。
