Endoscopic Balloon Dilatation Combined With PRP Injection in Colonic Stenosis in Crohn's Disease

Inclusion Criteria: * Diagnosed as CD; * Stenosis of the colon was found during colonoscopy, and surgery was not considered for the time being; ③ Narrow length \<5cm; ④ The patients agreed to undergo endoscopic balloon dilatation and voluntarily signed the informed consent to participate in this study, and were capable of complying with the agreement. Exclusion Criteria: * The patient has contraindications for endoscopic therapy, such as coagulation disorder, severe cardiopulmonary dysfunction, active bleeding, and inability to cooperate. * Deep and large active ulcer was found in the stenosis; * \< 18 years old; * Foreign patients; * Patients with a history of malignant tumors, including melanoma (except local skin cancer); * Pregnant or nursing patients; * Patients who could not be followed at all nodes of the primary outcome indicator; Other diseases that researchers believe could put patients at risk; * Other diseases that researchers believe could put patients at risk.