- Spinal canal narrowing--> compressing lumbar roots
- The result of degenerative joint disease, osteophytes, ligametum flavum hypertrophy, combination of processes
- Typically age related, but also congenital
- Much less commonly: fracture, infection, cancer
- Back pain that radiates down back of both legs
- Worse w/walking, improves w/rest
- Also better if walking while leaning forward (e.g. leaning on shopping cart)
- Progresses over time
- Exam may be unremarkable
- If severe, limited mobility
- Normal peripheral pulses a clue that not related to PAD