This Classifications in Brief review traces the development of the Eaton-Littler radiographic staging system for thumb CMC arthrosis. It covers the original 1973 four-stage description, the 1987 Eaton-Glickel modification adding scaphotrapezial involvement, and a critical appraisal of the system's reliability and clinical utility.
Radiographic stage and symptom severity are poorly linked in thumb CMC arthritis. A patient with Stage III changes may be asymptomatic, while a Stage II patient can be functionally disabled — this paper makes that disconnect explicit with prospective data.
When you see a patient with basilar thumb pain, let symptoms and functional limitation drive your treatment decision, not the Eaton-Littler stage alone. Surgery is appropriate only after exhausting nonsurgical options regardless of radiographic appearance.
When surgical treatment is pursued, stage still matters for procedure selection: FCR ligament reconstruction is appropriate for Stages I–II (95% good/excellent at 7 years), while Stage IV disease warrants arthroplasty or arthrodesis given only 20% excellent results with reconstruction.
Know this system for boards and for describing radiographic findings. But recognize that its weak interobserver reliability (κ as low as 0.11) and poor symptom correlation mean it cannot reliably substitute for clinical judgment in surgical planning.
This Classifications in Brief review traces the development of the Eaton-Littler radiographic staging system for thumb CMC arthrosis. It covers the original 1973 four-stage description, the 1987 Eaton-Glickel modification adding scaphotrapezial involvement, and a critical appraisal of the system's reliability and clinical utility.
Radiographic stage and symptom severity are poorly linked in thumb CMC arthritis. A patient with Stage III changes may be asymptomatic, while a Stage II patient can be functionally disabled — this paper makes that disconnect explicit with prospective data.
When you see a patient with basilar thumb pain, let symptoms and functional limitation drive your treatment decision, not the Eaton-Littler stage alone. Surgery is appropriate only after exhausting nonsurgical options regardless of radiographic appearance.
When surgical treatment is pursued, stage still matters for procedure selection: FCR ligament reconstruction is appropriate for Stages I–II (95% good/excellent at 7 years), while Stage IV disease warrants arthroplasty or arthrodesis given only 20% excellent results with reconstruction.
Know this system for boards and for describing radiographic findings. But recognize that its weak interobserver reliability (κ as low as 0.11) and poor symptom correlation mean it cannot reliably substitute for clinical judgment in surgical planning.