Knee Arthritis on X-Ray: What Grades 0 to 4 Actually Mean
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Does your knee X-ray have a grade? Radiographic grading or staging of arthritis is a tool, not a verdict. Knee osteoarthritis is staged on radiographs using the Kellgren-Lawrence scale, a system in play worldwide since 1957:
Grade 0 (Normal): No osteophytes, preserved joint space.
Grade 1 (Doubtful): Possible tiny osteophytes (bone spurs), no definite narrowing.
Grade 2 (Mild): Definite osteophytes, possible joint space narrowing.
Grade 3 (Moderate): Multiple osteophytes, definite narrowing, subchondral sclerosis, early deformity.
Grade 4 (Severe): Large osteophytes, severe narrowing (often bone-on-bone), marked sclerosis, definite deformity.
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Radiographs allow localization of disease to the medial, lateral, or patellofemoral compartment, assess varus or valgus alignment, and help guide
#kneepain treatment options. Weight-bearing views are essential, since lying-down images can make a worn joint look better than it is. The grade doesn't reverse-engineer the pain. Some Grade 4 knees walk + hike comfortably. Some Grade 2 knees are life-limiting. Treatment is driven by symptoms, function, and goals, never the film alone. First-line care stays the same at every stage: strengthening, weight management, and activity modification, with injections and surgery added when they match the clinical picture.
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UNO Bonus: invented (1971) by a barber, Merle Robbins, who sold the first decks from his shop, the name means "one" in Spanish and Italian; despite a color-matching reputation, Mattel has confirmed you cannot stack a Draw Four on a Draw Two - strictly a house rule.
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About Dr. Cory Calendine, MD - 3000 Edward Curd Lane, Franklin, TN 37067
In the operating room, I get to perform more than 600 hip & knee replacement surgeries each year. From LIVE surgical demos to viral video highlights, together let's explore - react - discuss all things related to bone and joint health.
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