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March cover for The Lancet. The inspiration paper is an expert consensus document on how to diagnose extraintestinal manifestations in patients with inflammatory bowel disease (IBD) - and how to measure how these conditions respond to treatments. - The most prominent of these extraintestinal manifestations are inflammation of the eye (uveitis); arthritis affecting the spine, hips and pelvis (axial spondyloarthritis); general joint pain (arthralgia); and skin conditions (psoriasis, erythema nodosum).