44-year-old physiotherapist with load-related hand and finger symptoms. He reports start-up stiffness in the finger joints and recurrent swelling after increased hand loading, such as home renovation work. He also experiences symptoms during work when his hands are mechanically loaded. Previous radiographs did not show abnormalities. Given the clinical suspicion of early hand osteoarthritis, ultrasound was performed to assess the capsular and peri-articular structures of the IP, PIP, and DIP joints bilaterally.
Ultrasound examination was focused on the capsular and peri-articular structures of the interphalangeal joints of both hands, including the IP joints of both thumbs and the PIP and DIP joints of the second and third rays where indicated.
At the DIP joints of the second ray bilaterally, minimal bony contour irregularities are visible. These findings are compatible with very mild osteophytic or degenerative joint margin changes, corresponding to grade 1 degenerative change.
The joint capsules of these DIP joints appear calm. There is no clear capsular thickening, synovitis, active hydrops, or periarticular inflammatory change at the time of examination.
The remaining assessed structures show a normal anatomical appearance. This includes the IP joints of the first ray bilaterally and the PIP joints of the second and third rays bilaterally. No clear ultrasound signs of degenerative change, synovitis, capsular irritation, hydrops, or capsuloligamentous abnormality are seen in these joints.
Although the ultrasound findings are minimal and inactive at the time of examination, the clinical pattern of start-up stiffness, load-related pain, and recurrent swelling remains compatible with early hand osteoarthritis, especially since radiographs may still be normal in very early disease.
1. Final diagnosis
Findings are consistent with very early mild degenerative joint change of the DIP joints of the second ray bilaterally, with minimal bony irregularity compatible with grade 1 osteophytic change. There are no ultrasound signs of active synovitis, hydrops, capsular irritation, or structural capsuloligamentous damage at the time of examination.
2. Differential diagnosis
The leading diagnosis is early interphalangeal osteoarthritis, particularly involving the bilateral second DIP joints. Differential considerations include load-related capsular irritation, early inflammatory arthritis, crystal arthropathy, or tenosynovial irritation, depending on the clinical pattern, duration of morning stiffness, symmetry, redness, warmth, swelling intensity, and laboratory findings.
3. Teaching points
Early hand osteoarthritis may be clinically symptomatic even when radiographs are still normal and ultrasound findings are subtle. Minimal DIP joint osteophytes can support early degenerative change, but absence of synovitis or hydrops means there is no active capsular inflammation at the time of scanning. Repeating ultrasound during a symptomatic flare may better demonstrate transient hydrops, synovitis, or capsular involvement.
4. Injury/disease information
Hand osteoarthritis commonly affects the DIP and PIP joints and may present with start-up stiffness, load-related pain, intermittent swelling, and reduced tolerance for gripping or repetitive hand use. In early disease, structural imaging abnormalities may be minimal. Management is usually directed toward load management, joint protection strategies, pacing of peak hand loads, maintaining mobility and strength, and hand therapy when symptoms affect work or daily function. Medical or rheumatologic evaluation is appropriate if inflammatory features develop, such as prolonged morning stiffness, warmth, redness, marked swelling, or spread to multiple joints.
Marc is founder of, and trainer at, SonoSkills. SonoSkills is an organization dedicated to MSK ultrasound education. He's also an MSK Sonographer at EchoConsult in Roermond, the Netherlands.
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