Thigh Muscle MRI Edema Features of Dermatomyositis Patients With Ovarian Cancer: A Report of Three Cases

Dermatomyositis (DM) is a rare inflammatory disease with systemic manifestations, including internal malignancy. Ovarian cancer is one of the most commonly found tumor types in DM patients. To date, no study has analyzed the MRI signals of dermatomyositis patients with cancer. Thus, in this report, we describe three cases in which we found ovarian cancer after the diagnosis of DM and observed a symmetrical honeycomb pattern edema signal distributed to the peripheral area of vastus laterals while adductors and posterior thigh compartments were relatively spared. Our report has important implications for clinicians to identify patients with dermatomyositis at potential ovarian cancer risk.