Possible Role of Early Transabdominal Ultrasound in Patients Undergoing Cytapheresis for Active Ulcerative Colitis

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Background Cytaphresis (CAP) is an effective modality in the treatment of active ulcerative colitis (UC), but the time lag before a notable clinical response on scheduled therapy frequently causes a significant delay in the modification of treatment. We previously reported that the clinical response after CAP was predicted by early application of transabdominal ultrasound (TAUS), but the predictability of long-term outcome after CAP still remains uncertain. Methods Patients: Twenty-six patients with active UC who received CAP were followed for 1 year. In addition to CAP they received pharmaceutical regimens, such as corticosteroid, 5-aminosalicylic acid, and immunomodulator, as indicated clinically. The mean UC-DAI score was 9.7 before CAP, and 3.2 at 1 year after CAP. Prognostic factor: Total colonic wall thickness was measured by TAUS at 2 to 3 weeks after the initiation of the treatment, and decrement from baseline was calculated. Early ultrasonographic response (EUR) was defined as a decrement statistically. UC-DAI score of 2 or less at 1 year was defined as sustained clinical remission. Score of 6 or more was defined as clinical relapse. Results EUR was defined as a decrement in wall thickness by at least 2.5 mm from the baseline. EUR was noted in 11 patients, and the remaining 15 did not attain EUR. Outcome measures: In the UC-DAI score measured at 1 year after initiation of treatment 90.9% of patients with EUR, whereas 40.0% with non-EUR (p<0.05) showed sustained clinical remission. Regarding relapse, within 1 year 9.1% of patients with EUR relapsed whereas 46.7% with non-EUR (p<0.05) relapsed. Conclusion Early application of TAUS may predict the long-term clinical outcome after CAP in patients with active UC.

Possible Role of Early Transabdominal Ultrasound in Patients Undergoing Cytapheresis for Active Ulcerative Colitis

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