Systemic Lupus Erythematosus (SLE)-Associated Jaccoud's Arthropathy.

Jaccoud's arthropathy (JA) is a chronic deforming arthropathy, initially linked to rheumatic fever, now more commonly associated with systemic lupus erythematosus (SLE). We report a case of a 27-year-old male presenting with a four-month history of joint pain in the bilateral hands and feet, accompanied by stiffness but no swelling, erythema, or fever. Physical examination revealed flexion deformities, ulnar deviation at the metacarpophalangeal joints, and hyperextension at the proximal interphalangeal joints, without tenderness. Laboratory findings showed elevated anti-double stranded DNA (anti-dsDNA) antibodies and positive antinuclear antibodies (ANA), and imaging confirmed non-erosive arthropathy. Diagnosed with SLE-associated JA, the patient was treated with prednisone, diclofenac, and hydroxychloroquine, leading to significant symptom improvement and decreased anti-dsDNA antibody levels. Even though non-erosive and non-deforming arthropathy is more commonly seen in SLE, timely identification of JA as a non-erosive but deforming arthritis is crucial in differentiating SLE from rheumatoid arthritis. This case underscores the need for comprehensive evaluation and tailored therapy in complex autoimmune conditions to prevent long-term joint damage and improve patient outcomes.