Dermatomyositis & Nasopharyngeal carcinoma

Dermatomyositis is an idiopathic inflammatory myopathy with prominent and characteristic cutaneous manifestation along with proximal muscle weakness 1. Bohan and Peter defined five diagnostic criteria for dermatomyositis 1. Nasopharyngeal carcinoma with paraneoplastic dermatomyositis is commonly seen in area with higher incidence of nasopharyngeal carcinoma like Asia countries. The association of dermatomyositis and nasopharyngeal carcinoma does not influence the prognosis of malignancy 3. Side effects of radiation therapy may worsen the skin inflammation seen and mimic a relapsed in certain cases.