Fig. 3

Time-series analysis of the treatment strategy. Anastomotic stenosis was diagnosed by fluoroscopy on postoperative day 26. EBD was performed on postoperative days 36, 43, and 47 (black arrows). Local steroid injection was performed alongside EBD on postoperative day 47. Systemic steroid treatment started on postoperative day 56. The oral administration of steroids started on day 15 (Postoperative day 71). Systemic steroid treatment finished on post-steroid treatment day 83 (postoperative day 139). The red and blue bars indicate periods of intravenous and oral steroid treatments, respectively