ObjectiveTo analyze the clinical characteristics of patients with amyopathic dermatomyositis with organizing pneumonia (ADM-OP).MethodsThe clinical data of 8 patients hospitalized with ADM-OP from June 2014 to June 2018 were retrospectively reviewed and simultaneously compared with those of 8 patients of cryptogenic organizing pneumonia (COP).ResultsThe incidence of skin lesion, Gottron’s sign, mechanic’s hand and positive anti-synthase antibodies in the ADM-OP patients were 87.5%, 87.5% 75.0% and 87.5% respectively. Gender, smoking, respiratory symptoms and signs, arterial partial pressure of oxygen, arterial partial pressure of carbon dioxide and treatment strategy were no statistical difference between ADM-OP and COP patients, but the onset age and Chest CT fibrosis scores (CTFS) on admission existed differences. After treatment for 3 months, CTFS, rate of change and forced vital capacity (FVC) existed differences. After treatment for 6 months, CTFS, rate of change, FVC and diffusing capacity of the lung for carbon monoxide existed differences.ConclusionsSkin lesion, Gottron’s sign, mechanic’s hand and positive anti-synthase antibodies are more common in ADM-OP patients. Their response to treatment is good but the improvement rates in CTFS and pulmonary function are slower than those of COP patients.
