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Diagnostic utility of anti-Saccharomyces cerevisiae antibody (ASCA) and Interferon-γ assay in the differential diagnosis of Crohn's disease and intestinal tuberculosis

 You Sun Kim  ;  Young-Ho Kim  ;  Dong Soo Han  ;  Chang Hwan Choi  ;  Beom Jin Kim  ;  Jai Hyun Choi  ;  Yong Sung Choi  ;  Jae Hee Cheon  ;  Yoon Tae Jeen  ;  Sung-Ae Jung  ;  Byung Ik Jang  ;  Byong Duk Ye  ;  Suk-Kyun Yang  ;  Young Sook Park  ;  Joo Sung Kim  ;  Won Ho Kim 
 Clinica Chimica Acta, Vol.412(17-18) : 1527-1532, 2011 
Journal Title
 Clinica Chimica Acta 
Issue Date
BACKGROUND: Differential diagnosis of Crohn's disease (CD) from intestinal tuberculosis (ITB) is challenging. Anti-Saccharomyces cerevisiae antibody (ASCA) is a specific serological marker for CD and INF-gamma assay (QuantiFERON-TB gold test, QFT) is a good supplementary diagnostic tool for ITB. We evaluated the clinical usefulness of ASCA and QFT for differential diagnosis of CD from ITB in Korean adults. METHODS: A total of 147 patients suspected to have ITB or CD were prospectively enrolled from 13 hospitals. ASCA IgG and IgA serum titers were measured by ELISA, and the QFT test was also performed. RESULTS: Thirty-two of 72 (44.4%) patients with CD were ASCA positive (titer >25U) compared to 10 of 75 ITB patients (13.3%) and 3 of 20 healthy controls (15%) (p<0.01). The QFT test was positive in 7 patients with CD (9.7%) and 50 patients with ITB (66.6%) (p<0.01). In cases which ASCA positive/QFT negative, the sensitivity, specificity, positive predictive value, and negative predictive value for the diagnosis of CD were 44.4%, 96.0%, 91.4%, and 64.3%, respectively. CONCLUSION: ASCA is a useful diagnostic tool for CD in Korea, where ITB is prevalent. In particular, when ASCA is combined with QFT, effective differential diagnosis of CD from ITB is possible.
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1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실)
Yonsei Authors
김원호(Kim, Won Ho) ; 천재희(Cheon, Jae Hee)
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