We report a 44-year-old male patient suffering from a 40-year course of relapsing dermatomyositis (DM) with onset in infancy. DM is an inflammatory disorder of the skeletal muscle and skin, with occasional involvement of joints and lung that occurs in adults and children. In most juvenile patients, their disease does not persist into adulthood. Patients with DM typically present with subacute, symmetric proximal weakness.

中文翻译：

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幼年型皮肌炎向成人型皮肌炎转变的形态学特征

我们报告了一名 44 岁男性患者，患有 40 年的复发性皮肌炎 (DM) 病程，在婴儿期发病。DM 是骨骼肌和皮肤的炎症性疾病，成人和儿童偶尔会累及关节和肺。在大多数青少年患者中，他们的疾病不会持续到成年。DM 患者通常表现为亚急性、对称性近端无力。