Ortho Dx: Arthritis of the knee

A 58-year-old woman presents with left knee pain for several months. She had a left knee arthroscopic lateral meniscectomy 10 years ago. Bilateral knee anteroposterior radiograph (Figure 1) taken 5 years ago showed moderate lateral joint line osteoarthritis. Repeat anteroposterior radiograph (Figure 2) shows that her arthritis has progressed significantly in the lateral compartment ...