RESUMO
Idiopathic inflammatory myopathies are neuromuscular disorders characterised by muscle weakness and histologically inflammation within the muscle. Dermatomyositis and polymyositis are highly associated with a wide range of cancers, especially in antitranscriptional intermediary factor-1 (TIF1)-gamma-positive myositis. We present a case of paraneoplastic dermatomyositis in a patient with a medical history of a FIGO stage 1B1 cervical squamous cell carcinoma. Anti-TIF1-gamma autoantibodies were detected by myositis lineblot analysis and a PET-CT scan revealed an abnormality positioned at the right ovary. She underwent laparoscopic exploration and pathological analysis of the PET-positive abnormality showed a lymphogenic metastasis of a squamous cell carcinoma, competitive with cervical carcinoma recurrence. She started chemoradiation as curative oncological treatment. The dermatomyositis was successfully treated with high-dose corticosteroids. Physicians should be aware of the association between myositis and the increased risk of malignancies.