Hand radiological damage in systemic sclerosis: comparison with a control group and clinical and functional correlations.

OBJECTIVE: To define the burden of hand radiological damage in systemic sclerosis (SSc) patients, compared with a control group.
METHODS: Both hands of 167 SSc patients and 168 hands (82 right and 86 left) of age- and gender-matched controls were imaged by conventional radiograph. Two musculoskeletal radiologists semiquantitatively scored the following lesions: tuft acro-osteolysis, tuft calcinosis, joint space narrowings, marginal erosions, surface erosions, collapse arthropathies, periarticular calcifications, and juxta-articular osteoporosis, at the following areas: tufts, distal interphalangeal, proximal interphalangeal, metacarpophalangeal, carpal, and first carpometacarpal joints. Clinical and functional characteristics of the 167 SSc patients were obtained from the Belgian Systemic Sclerosis Cohort database.
RESULTS: Tuft acro-osteolysis and calcinosis were the most common findings observed in SSc patients and were almost absent in controls. SSc patients displaying tuft acro-osteolysis/calcinosis suffered from more severe disease. Arthropathies were infrequently detected and mainly consisted of a mixture of osteoarthritis-related changes (joint space narrowing and surface erosions)-also observed in controls-and of 2 types of rare SSc-associated arthropathies: a rheumatoid arthritis-like pattern, characterized by marginal erosions (n = 7 patients), and a collapse arthropathy (n = 6 patients), characterized by pressure erosions and joint subluxation.
CONCLUSIONS: Although a rheumatoid arthritis-like or a collapse arthropathy can be observed in SSc patients, arthropathies are less common than previously reported.