Volume 33, Issue 12 pp. 1984-1989
Gastroenterology

Prediction of disease activity of Crohn's disease through fecal calprotectin evaluated by balloon-assisted endoscopy

Fumihiko Iwamoto

Fumihiko Iwamoto

Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan

First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan

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Katsuyoshi Matsuoka

Corresponding Author

Katsuyoshi Matsuoka

Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan

Correspondence

Mamoru Watanabe and Katsuyoshi Matsuoka, Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan.

Email: [email protected]; [email protected]

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Maiko Motobayashi

Maiko Motobayashi

Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan

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Kento Takenaka

Kento Takenaka

Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan

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Toru Kuno

Toru Kuno

First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan

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Keisuke Tanaka

Keisuke Tanaka

First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan

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Yuya Tsukui

Yuya Tsukui

First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan

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Shoji Kobayashi

Shoji Kobayashi

First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan

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Takashi Yoshida

Takashi Yoshida

First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan

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Toshimitsu Fujii

Toshimitsu Fujii

Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan

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Eiko Saito

Eiko Saito

Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan

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Tatsuya Yamaguchi

Tatsuya Yamaguchi

First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan

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Masakazu Nagahori

Masakazu Nagahori

Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan

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Tadashi Sato

Tadashi Sato

First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan

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Kazuo Ohtsuka

Kazuo Ohtsuka

Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan

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Nobuyuki Enomoto

Nobuyuki Enomoto

First Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan

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Mamoru Watanabe

Corresponding Author

Mamoru Watanabe

Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan

Correspondence

Mamoru Watanabe and Katsuyoshi Matsuoka, Department of Gastroenterology and Hepatology, School of Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan.

Email: [email protected]; [email protected]

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First published: 11 June 2018
Citations: 21
Declaration of conflict of interest: Katsuyoshi Matsuoka has received research grant and lecture fees from Thermo Fisher Scientific. Mamoru Watanabe has received research grant from Thermo Fisher Scientific.
Financial support: This study was supported by Thermo Fisher Scientific in fecal calprotectin measurements.

Abstract

Background and Aim

Fecal calprotectin (FC) is a useful marker for assessing the activity of intestinal inflammation. However, most studies have used ileocolonoscopy to evaluate the association of FC with intestinal inflammation, and it is not clear whether FC is useful for the evaluation of small-bowel Crohn's disease (CD). This study aimed to determine the usefulness of FC for predicting intestinal inflammation evaluated by balloon-assisted endoscopy (BAE), which can visualize the deep small intestine.

Methods

This was a cross-sectional, observational study involving 69 CD patients, 39 of whom had only small-bowel disease. The extended simplified endoscopic activity score for Crohn's disease (eSES-CD) was calculated based on the findings of BAE. Mucosal healing was defined as an eSES-CD of 0.

Results

In all CD patients, FC levels were correlated with the eSES-CD (r = 0.663, P < 0.001). The cutoff value to predict mucosal healing was 92 mg/kg, with a sensitivity of 94%, specificity of 88%, positive predictive value of 98%, negative predictive value of 64%, and the area under the curve of 0.91. Even in small-bowel CD patients, FC levels were correlated with the eSES-CD (r = 0.607, P < 0.001). The cutoff value was 92 mg/kg, with a sensitivity of 87%, specificity of 88%, positive predictive value of 96%, negative predictive value of 64%, and area under the curve of 0.85.

Conclusions

Fecal calprotectin showed a significant correlation with the intestinal inflammation evaluated with BAE even in patients with only small intestinal disease. FC is useful for the evaluation of CD including both the small and large intestines.

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