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Diffuse alveolar damage in patients with dermatomyositis: a six-case series
Yuko Matsuki1, Hiroyuki Yamashita, Yuko Takahashi
1Division of Rheumatic Diseases, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku, Tokyo 162-8655, Japan. matsuki-y@ncchd.go.jp
Modern Rheumatology
|September 10, 2011
Summary
Early intravenous pulse cyclophosphamide (IVCY) may benefit patients with dermatomyositis (DM) and interstitial pneumonia. Prompt treatment is crucial for diffuse alveolar damage (DAD) in DM, especially with elevated ferritin or KL-6 levels.
Area of Science:
- Pulmonology
- Rheumatology
- Pathology
Background:
- Dermatomyositis (DM) can present with severe myopathy or clinically amyopathic DM (CADM).
- Interstitial pneumonia is a serious complication of DM, potentially leading to diffuse alveolar damage (DAD).
Observation:
- Six cases of DM with DAD were analyzed over 8 years.
- DAD developed shortly after DM onset in all patients.
- Five patients with DAD did not respond to standard therapies like steroids, cyclosporine, or tacrolimus.
Findings:
- Elevated serum Krebs von der Lungen-6 (KL-6) and ferritin levels may predict lethal DAD.
- Early intravenous pulse cyclophosphamide (IVCY) therapy was associated with survival in one CADM patient.
- Delayed IVCY was ineffective for advanced DAD.
Implications:
- Prompt initiation of IVCY therapy may be beneficial for DM patients with interstitial pneumonia and elevated biomarkers (ferritin, KL-6).
- Early detection and intervention are critical for managing DAD in DM.
- This suggests a potential therapeutic window for IVCY in specific DM-associated lung conditions.
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