Intervertebral Disc Disease (IVDD) Type II

NeurologyCanineNew

Key Points

Type II IVDD, also known as Hansen Type II, is a gradual protrusion of the intervertebral disc that results in chronic compression of the spinal cord
Most commonly seen in middle-aged to older non-chondrodystrophic breed dogs
Clinical signs progress over weeks-months and commonly include ataxia, limb weakness, nail scuffing and difficulty rising
- Often mistaken by owners as normal changes that occur with age
Pain is often mild, intermittent or absent so a lack of marked spinal pain doesn’t rule out type II IVDD
Thorough neurological exams and imaging to visualise the spinal cord compression are key for diagnosis
Treatment can be conservative for mild or stable cases, but surgery is recommended for progressive or severe cases

Differential Diagnoses

Degenerative myelopathy
Spinal neoplasia
Cervical spondylomyelopathy (Wobbler syndrome)

Educational content only. This factsheet is for general veterinary education and is not a substitute for professional veterinary advice, diagnosis, or treatment. Not for use in an emergency — contact a veterinarian or emergency service. Full disclaimer →