Retention of Elongated Primary Trabeculae

• Happens due to impaired osteoclastic activity
• Primary trabeculae do not transform into secondary and tertiary
• Continue to elongate
• Form a dense band beneath growth plate - growth retardation lattice
• Dense spikules apparent on radiographs
• Can be caused by Distemper Virus, Bovine Viral Diarrhoea Virus