Abstract

The association of dermatomyositis with malignant disease has been established, but the relationship between dermatomyositis and recurrence or metastasis of neoplasm remains unclear. In Taiwan, nasopharyngeal cancer is the most common malignancy associated with dermatomyositis while gastric cancer-associated dermatomyositis is rarely reported. We present a case of a 70-year-old male who had a past history of gastric adenocarcinoma and underwent subtotal gastrectomy 2 years ago. The diagnosis of dermatomyositis was made due to painful swelling of the bilateral upper arms, malar rashes, symmetric proximal weakness and dysphagia. In addition, a newlydiscovered liver mass was found to be metastasis from gastric cancer. Gastric cancer-associated dermatomyositis is rarely reported, and this case can serve as a reminder to physicians that the development of dermatomyositis in patients with cancer history may imply the potential hazard of recurrent or metastatic malignancy.

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