ArticleFoot & ankle orthopaedics2020
Validation of 9-Grid Scheme for Localizing Osteochondral Lesions of the Talus.
Article in Foot & ankle orthopaedics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Osteochondral Autograft Transplantation Coupled With Platelet-Rich Plasma and Hyaluronic Acid Injections Can Yield Favorable Outcomes in Patients With Osteochondral Lesions of the Talus.Arthroscopy, sports medicine, and rehabilitation · 2025Article
- Minimally Invasive Management of Posterolateral Osteochondral Lesions of the Talus Using Posterior Ankle Arthroscopy and Autologous Iliac Osteochondral Grafts.Arthroscopy techniques · 2025Article
- Osteochondral Lesions of the Distal Tibial Plafond: A Systematic Review of Lesion Locations and Treatment Outcomes.Orthopaedic journal of sports medicine · 2021Review
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Authors and funding
7 authors.
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Abstract
backgroundA 9-grid scheme has been integrated into the foot and ankle literature to help clinicians and researchers localize osteochondral lesions of the talus (OLTs). We hypothesized that fellowship-trained orthopedic foot and ankle surgeons would have a high rate of intra/inter-observer reliability when localizing OLTs, therefore validating the scheme.
methodsWe queried our institution's foot and ankle radiographic database for magnetic resonance images with OLTs. Each MRI was reviewed by the senior author, and 2 key images (widest OLT diameter) from each tangential view were copied and combined onto one slide. Fifty consecutive deidentified images of ankles were then sent to 4 practicing fellowship-trained foot and ankle surgeons. Each was asked to identify which zone the OLT was localized within. A radiologist's report served as the control. Statistical analyses were performed using Cohen and Fleiss kappa tests.
resultsThe reviewers demonstrated majority consensus on 45/50 images with substantial agreement for zones 4 and 6. The interobserver reliability was moderate with a κ = 0.55. The mean intraobserver reliability was substantial, with a κ = 0.79. A musculoskeletal radiologist determined there were 3 lesions in zone 7, 18 lesions in zone 4, and 29 lesions in zone 6.
conclusionThis study is the first to critically evaluate the 9-grid scheme and its reliability among orthopedic foot and ankle surgeons. Our study found that the 9-grid scheme is an accurate method of localization for OLTs with high intra- and moderate interobserver reliability between surgeons. LEVEL OF EVIDENCE: Level IV, retrospective diagnostic study.
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