Diagnosing Broiler Leg Problems

Contents

Glossary

 This is a glossary of terms used in diagnosing broiler leg problems. Click here for links to more extensive medical dictionaries online.


  
Chondroepiphysis (CE)
Cartilage end of long bone beneath articular cartilage.
 
Diaphysis
Shaft of long bone.
  
Dyschondroplasia
Focal failure of endochondral ossification, composed of unmineralized, poorly vascularized cartilage. Lesion has a normal growth plate band with persistence of a population of transitional cells in the metaphysis.
 
Epiphyseal vessels
Nutrient supply to growth plate band.
 
Growth plate
Area of specialization at ends of long bone allowing for sustained growth in length until sexual maturity. Composed of distinct zones of proliferating, transitional and hypertrophied cells producing cartilage lattice work on which bone forms. (See general info in Wheeless' Textbook of Orthopaedics).
 
 Growth plate band (GPB)
Band of proliferating and transitional cells of growth plate.
 
 Hypertrophic Cartilage (CC)
Spicules of hypertrophied chondrocytes with associated extracellular matrix between vascular tunnels.
 
Metaphysis
Trabecular bone lattice arising from endochondrial ossification.
 
Metaphyseal Vessels
Eroded, invading cartilage.
 
None Present
Not observed in this condition.
 
Periosteum
Connective tissue envelope covering cortical bone.
 
 Physis
The growth area of the bone near the end.
 
Proliferating Cartilage
The location in which bone length is created by active growth of cartilage cells.
 
Rickets
Generalized failure of endochondrial ossification with lack of mineralization of the epiphyseal cartilage matrix and poor vascular invasion. (See general info in Wheeless' Textbook of Orthopaedics).
 
...Vitamin D and/or Ca++ deficiency Rickets
Elongation of growth plate band with poor differentiation of proliferating cells, increase unmineralized organic matrix (osteoid) and poor remodeling of CC. (See general info in Wheeless' Textbook of Orthopaedics).
 
...Phosphorus Deficiency and or Ca++ Excess Rickets
Normal growth plate band and failure of remodeling of cartilage columns and relatively normal vascular invasion.
Tibial Dyschondroplasia (TD)
 
Vascular Invasion of Cartilage
 

For a more extensive list of terms online in English, try Intelihealth or MedicineNet.
 
Multilingual dictionaries are also available online in Dansk, Deutsche, English, Español, Français, Italiano, Nederlands, and Português.

 

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For info on this page contact Gene Pesti, gpesti@uga.edu, University of Georgia Department of Poultry Science
Date Last Modified: 6/2/99