This will be a prospective, randomized, parallel group, pragmatic trial.~Prior to study group assignment, the type of biological therapy to be (eventually) used in the postoperative phase will be selected by the treating physician after thorough discussion with the patient. The use of cheaper anti-TNF biosimilars will be encouraged, but patients who received adalimumab and/or infliximab preoperatively cannot receive the same treatment again in SOPRANO CD if the participants previously encountered immunogenicity issues to this treatment.~Systematic postoperative prophylaxis with a biological:~Biological therapy (adalimumab, infliximab, ustekinumab, vedolizumab or risankizumab) will be initiated within 14 to 40 days after ileocolonic resection or restoration of the faecal stream (day 0).~In patients with both Harvey-Bradshaw Index (HBI) based clinical recurrence (HBI >4) and endoscopic recurrence (Rutgeerts score ≥i2b) at week 30, biological therapy will be optimized (reimbursed or through the available free goods / samples programs).~Beyond week 32 optimization of this biological therapy will be allowed following daily clinical practice including proactive therapeutic drug monitoring. However, the timing, type and reason for dose optimization should be recorded.~Endoscopy-driven postoperative biological therapy:~No CD related therapy will be administered between Baseline (14 to 40 days after ileocolonic resection or restoration of the faecal stream) and the endoscopic evaluation at week 30 Patients with endoscopic recurrence (Rutgeerts score ≥i2b) at week 30 will initiate biological therapy (adalimumab, infliximab, ustekinumab, vedolizumab or risankizumab) following a classical induction and maintenance schedule. The type of biological therapy has to be decided already in the perioperative phase to allow a proper stratification.~In patients initiating biological therapy at week 30, this therapy maybe optimized from week 32 onwards following daily clinical practice including proactive therapeutic drug monitoring. However, the timing, type and reason for dose optimization should be recorded.~In patients not on biological therapy yet but developing clinical recurrence (HBI >4) with objective signs of disease recurrence (faecal calprotectin >250 µg/g, C-reactive protein >5 mg/L or endoscopic recurrence ≥i2b or clear radiological disease activity at the neo-terminal ileum) beyond week 32, biological therapy can be initiated, but this will be regarded as a study failure.~Randomization:~Eligible patients will be allocated to one of the two treatment arms (1:1) according to a computer generated randomisation list in REDCap.~Stratified randomisation will be performed to achieve approximate balance for:~Type of selected postoperative prophylactic therapy: adalimumab, infliximab, ustekinumab, vedolizumab or risankizumab.~Number of risk factors for postoperative recurrence: 1, 2 or >2 (out of 5 predefined factors: active smoking, penetrating disease, previous ileocolonic resection ≤10 years of index surgery, ≥2 previous ileocolonic resections, biological therapy ≤3 months of index ileocolonic resection)
With this prospective, randomized, multicentre, parallel group pragmatic non-inferiority trial, the investigators will evaluate if endoscopy-driven introduction of biological therapy is not leading to more postoperative endoscopic recurrence at week 86 compared to systematic prophylactic biological therapy in patients with CD undergoing an ileocolonic resection with ileocolonic anastomosis. Secondary analyses will include influence on clinical, biological and surgical CD recurrence, serious adverse events, direct costs, work productivity, and quality of life. If the investigators can demonstrate the non-inferiority of an endoscopy-driven approach, this patient-tailored management could be advocated, while a more expensive systematic introduction of biological therapies could be limited.~Finally, endoscopic images provided through the SOPRANO CD study, will be used to develop a new scoring system evaluating postoperative endoscopic recurrence.