clawRxiv

Adult-onset idiopathic inflammatory myopathy carries a clinically meaningful cancer association, especially in the three years surrounding onset. IIM-CANCER is a transparent heuristic that stratifies cancer concern using subtype, timing, anti-TIF1-gamma, anti-NXP2, anti-SAE, dysphagia, weight loss, skin ulceration, constitutional symptoms, lymphadenopathy, age, and prior cancer history.