Prospective Randomized Comparative Study of the Treatment of Multisegmental Fibrostenosing Crohn's Disease.

1. Subjects had been diagnosed with CD for at least 3 months prior to screening, and the diagnosis of CD had clinical findings and endoscopic, imaging evidence, and was supported by histopathology reports
2. Subject is in remission from CD (CDAI score \< 150)
3. Subjects had clinical findings of multiple fibrotic strictures of the bowel with obstruction (abdominal pain with distension, decreased stool frequency and / or symptoms of nausea and vomiting) and imaging evidence (MRE and bowel color ultrasound suggested intestinal fibrosis with greater than 50% reduction in diameter and greater than 20% thickening of the bowel wall with dilation of the proximal bowel), and endoscopic evidence (endoscopy was unable to pass)
4. Subjects had ≥ 2 small bowel strictures from duodenum to rectum and ≥ 20 cm maximum distance between coloanal and caudal strictures
5. Study process prior to initiation, the subject or subject's legal representative (if applicable) signed and dated a written informed consent form or any required documentation of privacy authorization
6. Female subjects who remained sexually and of childbearing potential with an ungerminated male partner, consented to adequate routine contraception throughout the study period starting with signing informed consent

Exclusion Criteria:

1. At the initial screening visit, subject presented with enterocutaneous fistula, abdominal abscess, evidence of gastrointestinal bleeding
2. Subjects were in active CD (CDAI score ≥ 150)
3. The subject had inflammatory activity in the stenotic bowel (as judged by a combination of blood inflammatory indices, endoscopy, ultrasound and imaging)
4. Presence of ileostomy, colostomy
5. Subjects had a history or evidence of adenomatous colonic polyps that had not been resected or had a history or evidence of dysplasia of the colonic mucosa, including low - or high-grade dysplasia, and an undiagnosed type of dysplasia
6. Subjects had suspected or confirmed ulcerative colitis, undiagnosed types of colitis, ischemic colitis, radiation enteritis, colitis associated diverticular disease, or microscopic colitis
7. Subjects had evidence of active infection during the screening period
8. Subject has active tuberculosis: chest X-ray performed within 3 months prior to week 0 results suggestive of suspected tuberculosis
9. Subjects with any defined inborn or acquired immunodeficiency (e.g., common various immunodeficiencies, human immunodeficiency virus [HIV] infection, organ transplantation)
10. Subjects had a clinically significant infection (e.g., pneumonia, pyelonephritis) or an ongoing chronic infection within 30 days prior to screening
11. The subject suffered from any unstable or uncontrolled cardiovascular, pulmonary, hepatic, renal, gastrointestinal, genitourinary, hematological, coagulation, immune, endocrine / metabolic or other medical condition that, in the opinion of the investigator, would interfere with the outcome of the study or jeopardize the safety of the subject
12. The subject's medical history included malignancy
13. Subjects had abnormal laboratory results for any of the following during screening: hemoglobin \< 5 g / dl; white blood cell (WBC) count \< 3 × 10E9 / L; platelet count \< 100 × 10E9 / L or > 1200 × 10E9 / L; alanine transaminase (ALT) or aspartate transaminase (AST) > 3 × upper limit of normal (ULN), and serum creatinine > 2 × ULN.
14. Subjects were unable to attend all study visits or comply with study flow plans female subjects were pregnant prior to study enrollment, during study enrollment, or plan to donate eggs during these time periods
15. Subjects were forced to consent to participate in the study
16. Investigators considered the subject unsuitable for endoscopic or surgical treatment