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Fig. 1 | Arthritis Research & Therapy

Fig. 1

From: A search to the target tissue in which RA-specific inflammation starts: a detailed MRI study to improve identification of RA-specific features in the phase of clinically suspect arthralgia

Fig. 1

Plot of prevalence of all possible pairs of MRI inflammatory features in both converters and non-converters in the discovery cohort. Pairs of features that were only present in patients that progressed to arthritis < 1 year (converters; n = 34) and not in non-convertors (n = 191) are indicated in red. Pairs of features only present in non-convertors are indicated in green. The L-shaped box depicts extensor peritendinitis of the MCP (2–5) joints, and the rectangle depicts a combination of inflammation (synovitis, tenosynovitis or BME) in the wrist and in MTP (1–5). MRI, magnetic resonance imaging; CSA, clinically suspect artralgia; BME, bone marrow edema; MTP, metatarsophalangeal; MCP, metacarpophalangeal; HA, hamate; CA, capitate; TD, trapezoid; TM, trapezium; PI, pisiform; TQ, triquetrum; LU, lunate; SC, scaphoïd; UL, distal ulna; RAD, distal radius. Tenosynovitis wrist: (I) extensor pollicis brevis, abductor pollicis longus; (II) extensor carpi radialis brevis, extensor carpi radialis longus; (III) extensor pollicis longus; (IV) extensor digitorum communis, extensor indicus proprius; (V) extensor digiti quinti proprius; (VI) extensor carpi ulnaris; (1) flexor carpi ulnaris; (2) ulnar bursa, including flexor digitorum profundus and superficialis tendon quartets; (3) flexor pollicis longus in radial bursa; (4) flexor carpi radialis

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