A translated 1936 French classic by M. Robert describing the anatomic basis for dedicated radiographic imaging of the trapeziometacarpal joint. It explains why standard AP wrist views fail and establishes forced pronation as the preferred positioning technique. The paper also characterizes the radiographic progression of TMC degenerative arthritis from early joint space narrowing to end-stage trapezial erosion.
Vague diffuse thumb pain with tenderness at the base of the thumb is TMC arthritis until proven otherwise — and standard AP wrist films will miss early disease because the joint is oblique to that imaging plane.
When you order a dedicated TMC view, specify forced pronation with the dorsal surface on the plate and beam centered over the joint. This is the technique Robert established in 1936 and it remains the standard.
Interpret the films in sequence: lateral joint space narrowing comes first, then subchondral sclerosis, then trapezial osteophytes, then erosion. A trapezium taking on a scaphoid shape on X-ray means advanced, irreversible disease.
This paper's core clinical lesson: by the time you can see bony changes on the film, the window for arresting structural damage has passed. Early diagnosis and intervention matter.
A translated 1936 French classic by M. Robert describing the anatomic basis for dedicated radiographic imaging of the trapeziometacarpal joint. It explains why standard AP wrist views fail and establishes forced pronation as the preferred positioning technique. The paper also characterizes the radiographic progression of TMC degenerative arthritis from early joint space narrowing to end-stage trapezial erosion.
Vague diffuse thumb pain with tenderness at the base of the thumb is TMC arthritis until proven otherwise — and standard AP wrist films will miss early disease because the joint is oblique to that imaging plane.
When you order a dedicated TMC view, specify forced pronation with the dorsal surface on the plate and beam centered over the joint. This is the technique Robert established in 1936 and it remains the standard.
Interpret the films in sequence: lateral joint space narrowing comes first, then subchondral sclerosis, then trapezial osteophytes, then erosion. A trapezium taking on a scaphoid shape on X-ray means advanced, irreversible disease.
This paper's core clinical lesson: by the time you can see bony changes on the film, the window for arresting structural damage has passed. Early diagnosis and intervention matter.