The relationship between meniscal pathology and osteoarthritis depends on the type of meniscal damage visible on magnetic resonance images: data from the Osteoarthritis Initiative

• Published in: Osteoarthritis and cartilage 2017-01, Vol.25 (1), p.76-84
• Main Authors: Antony, Benny, Dr, Driban, Jeffrey B, Price, Lori Lyn, Lo, Grace H, Ward, Robert J, Nevitt, Michael, Lynch, John, Eaton, Charles B, Ding, Changhai, McAlindon, Timothy E
• Format: Article
• Language: English
• Subjects: Arthralgia - diagnostic imaging; Arthralgia - pathology; Bone marrow lesions; End-stage knee osteoarthritis; Female; Humans; Knee Joint - diagnostic imaging; Knee Joint - pathology; Knee pain; Magnetic Resonance Imaging; Male; Meniscus; Meniscus - diagnostic imaging; Meniscus - pathology; Middle Aged; Osteoarthritis, Knee - classification; Osteoarthritis, Knee - diagnostic imaging; Osteoarthritis, Knee - pathology; Rheumatology; Tear
• ISSN: 1063-4584; 1522-9653
• DOI: 10.1016/j.joca.2016.08.004

Summary Objective To determine the association of different types of meniscal pathology with common measures of osteoarthritis severity and progression: knee pain, bone marrow lesion (BML) volume, and end-stage knee osteoarthritis (esKOA). Design Participants were selected from an ancillary project to the Osteoarthritis Initiative (OAI) who had at least one knee with symptomatic osteoarthritis. Baseline magnetic resonance images (MRI) were evaluated for meniscal pathology using a modified International Society of Arthroscopy, Knee Surgery, and Orthopaedic Sports Medicine (ISAKOS) classification system. We collapsed 10 types of meniscal pathology into 5 categories: normal, intrameniscal signal, morphological deformity/extrusion (altered meniscal shape and/or extrusion but no apparent substance loss), tear, and maceration. Outcomes included WOMAC knee pain and BML volume at baseline and after 2-years. We defined the prevalence of esKOA based on a validated algorithm. We performed logistic regression and adjusted for age, sex, and body mass index (BMI). Results The 463 participants (53% male) included in the analysis had mean age 63 (9.2) years, BMI 29.6 (4.6) kg/m2 , and 71% had Kellgren-Lawrence grade≥2. Morphological deformity/extrusion and maceration, but no other types of meniscal pathology, were associated with BML volume (morphological deformity/extrusion odds ratio [OR]=2.47,95%CI:1.49,4.09, maceration OR=5.85,95%CI:3.40,10.06) and change in BML volume (morphological deformity/extrusion OR=2.17,95%CI:1.37,3.45, maceration OR=3.12,95%CI:1.87,5.19). Only maceration was associated with baseline WOMAC knee pain (OR=2.82,95%CI:1.79,4.43) and prevalence of esKOA (OR=7.53,95%CI:4.25,13.31). Conclusions Based on MRI, morphologic deformity/extrusion and maceration rather than intrameniscal signal or tear were associated with osteoarthritis severity and progression, which highlights the importance of differentiating distinct types of meniscal pathology.