Abstract:
OBJECTIVES:To develop an MRI enterography global score (MEGS) of Crohn's disease (CD) activity compared with a reference standard of faecal calprotectin (fC), C-reactive protein (CRP) and Harvey-Bradshaw index (HBI). METHODS:Calprotectin, CRP and HBI were prospectively recorded for 71 patients (median age 33, male 35) with known/suspected CD undergoing MRI enterography. Two observers in consensus scored activity for nine bowel segments, grading mural thickness, T2 signal, mesenteric oedema, T1 enhancement and pattern, and haustral loss. Segmental scores were multiplied according to disease length. Five points each were added for lymphadenopathy, comb sign, fistulae and abscesses to derive the MEGS. A previously validated MRI CD activity score (CDAS) was also calculated. MRI scores were correlated with clinical references using Spearman's rank. A logistic regression diagnostic model was built to discriminate active (fC > 100 μg/g) from inactive disease. RESULTS:MEGS and CDAS were significantly correlated with fC (r = 0.46, P < 0.001) and (r = 0.39, P = 0.001) respectively. MEGS correlated with CRP (r = 0.39, P = 0.002). The model for discriminating active from inactive disease achieved an area under the receiver-operating curve of 0.75 and 0.66 after leave-one-out analysis. CONCLUSION:A magnetic resonance enterography global score (MEGS) of CD activity correlated significantly with fC levels. KEY POINTS:• Magnetic resonance imaging is now widely used to assess Crohn's disease. • Existing MRI activity scores depend on local segmental endoscopic/histological reference standards. • Scores including assessment of disease extent/complications better demonstrate full disease burden. • This new global Crohn's disease burden score correlates with calprotectin and CRP. • The MRI enterography score of disease activity can complement existing clinical markers.
journal_name
Eur Radioljournal_title
European radiologyauthors
Makanyanga JC,Pendsé D,Dikaios N,Bloom S,McCartney S,Helbren E,Atkins E,Cuthbertson T,Punwani S,Forbes A,Halligan S,Taylor SAdoi
10.1007/s00330-013-3010-zsubject
Has Abstractpub_date
2014-02-01 00:00:00pages
277-87issue
2eissn
0938-7994issn
1432-1084journal_volume
24pub_type
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