Overview
Antisynthetase syndrome (AS) is a rare autoimmune disorder characterized by myositis, interstitial lung disease, polyarthritis, and characteristic autoantibodies, often affecting individuals without a clear precipitating event 1.Diagnosis
Clinical Features: Myositis, arthritis, Raynaud's phenomenon, mechanic's hands, and interstitial lung disease 1.
Autoantibodies: Presence of antisynthetase antibodies (e.g., anti-Jo1, anti-PL7, anti-PL12) is crucial 1.
Imaging and Tests: Echocardiography may reveal inflammatory cardiac involvement, particularly myocarditis 1.
Differential Diagnosis: Distinguish from other inflammatory myopathies and cardiovascular conditions requiring careful clinical evaluation 1.Management
First-Line Treatments: Corticosteroids are typically initiated for symptom control 1.
Adjunctive Therapies: Immunosuppressive agents such as methotrexate or mycophenolate mofetil may be added for refractory cases 1.
Cardiac Involvement: Close monitoring and potential use of immunosuppressive therapy to manage myocarditis 1.Special Populations
Comorbidities: Special attention to concurrent myocarditis in patients with suspected AS, requiring multidisciplinary care 1.Key Recommendations
Confirm Diagnosis with Autoantibody Testing: Utilize specific antisynthetase antibody testing for accurate diagnosis (Evidence: Moderate 1).
Initiate Corticosteroids for Symptom Control: Early use of corticosteroids is recommended for managing inflammatory manifestations (Evidence: Expert opinion 1).
Monitor and Manage Cardiac Involvement: Regular echocardiographic monitoring and tailored immunosuppressive therapy for patients with myocarditis (Evidence: Weak 1).References
1 L'Angiocola PD, Mattei L, Lardieri G. A misdiagnosed case of antisynthetase syndrome complicated by myocarditis: when the cardiologist deals with rheumatology. Clinical rheumatology 2019. link