RT Journal Article SR Electronic T1 The prevalence, clinical features, predictive factors and investigations to screen for cancer in patients with inflammatory myositis JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 100 OP 104 DO 10.15537/smj.2021.1.25590 VO 42 IS 1 A1 Ghassan Aljohani A1 Eman A. Bin Awad A1 Khalid Alshahrani A1 Mubark M. Alsaqar A1 Bashayer Albogami A1 Saleh H. Almotywee A1 Hisham Almaimouni A1 Abdullah S. Dirar A1 Abdulrahman Alrashid A1 Rajkumar Rajendram A1 Emad Masuadi A1 Mohammed A. Omair YR 2021 UL http://smj.org.sa/content/42/1/100.abstract AB Objectives: To describes the epidemiology of cancer in patients with idiopathic inflammatory myopathies (IIM) treated at 2 tertiary centers in Riyadh, Saudi Arabia.Methods: This was a retrospective multi-center study evaluating the prevalence and the type of malignancy in an IIM population in King Saud University Medical City and King Abdulaziz Medical City between August 2017 to August 2018.Results: In total, 60 patients were included. Four had neoplasms (6.7%), 2 men had lymphoma, a woman had breast cancer and a second, ovarian cancer. Two patients died due to cancer or its complications. Older age (age >40 years), dysphagia, necrotic rash, absence of interstitial lung disease, high erythrocyte sedimentation rate and a negative anti Jo-1 antibody were potentially predictive risk factors for neoplasm. All patients diagnosed with cancer-associated myositis were investigated with routine and invasive modalities. Three of the 4 patients had abnormal findings in both modalities. One patient, the routine investigations were unremarkable, but a computed tomography of the pelvis revealed an ovarian mass that was subsequently diagnosed as malignant.Conclusion: An individualized approach might be more appropriate for high risk patients. Larger prospective studies are required to confirm the findings of the current study.