Amyopathic Dermatomyositis in a Patient With Breast Cancer in Remission: A Case Report and a Systematic Review of the Literature

Amyopathic dermatomyositis is a rare inflammatory disease in the spectrum of dermatomyositis characterized by typical skin lesions in the absence of muscle involvement. Dermatomyositis is a well-known paraneoplastic syndrome that can reveal or indicate a relapse of an underlying malignancy. To our knowledge, only a few cases of amyopathic dermatomyositis associated with breast cancer have been described in the literature. Here, we describe the case of a 52-year-old female with known triple-negative breast cancer in remission presenting with amyopathic dermatomyositis with a good response to hydroxychloroquine, and we performed a systematic review of this disease association. These patients should be followed closely for skin manifestations recurrence, therefore cancer recurrence or a new malignancy diagnosis.