Diseases of Poultry
By Ivan Dinev, DVM, PhD
496.497.Dyschondroplasia is a defect of the growth plates in meat type poultry. It is characterized by abnormal cartilage masses under the growth plates of long bones. Most commonly, it is established in the proximal tibiotarsus and that is why it is called tibial dyschondroplasia. Dyschondroplasia could be also seen in the proximal and distal femur, the distal tibia and the proximal humerus. Clinically, affected chickens exhibit reluctance to move and lameness. Fractures could also be seen. The aetiology of dyschondroplasia is related to genetic factors, rapid growth in broilers, vitamin D metabolism, mycotoxins etc.