A 62-year-old man with knee osteoarthritis is compared with a 62-year-old man with post-traumatic osteoarthritis following a tibial plateau fracture 15 years ago. Which radiologic finding best distinguishes primary (idiopathic) osteoarthritis from secondary osteoarthritis?

See the options, answer & explanation

Sign in free to reveal the answer choices, the correct answer, the detailed explanation, and AI-powered insights for this question.