Single-Session No-Touch Hysteroscopic Mechanical Resection for Cesarean Scar Pregnancy: A Novel Primary Treatment Approach.

Background/Objective: Cesarean scar pregnancy (CSP) represents a challenging and potentially life-threatening form of ectopic pregnancy. This study aims to assess the feasibility, safety, and clinical efficacy of employing the hysteroscopic mechanical tissue removal system as a primary treatment modality for CSP. Methods: This retrospective cohort study included 53 patients diagnosed with CSP who underwent primary hysteroscopic resection at a tertiary care center. The surgical procedure was performed by prioritizing the "no-touch" vaginoscopic approach, which avoids instrumentation. Success rates, operation time, time to negative serum β-hCG, complications, and differences between the anatomical types of CSP (Type 1 vs. Type 2) were analyzed. Results: Primary hysteroscopic treatment was successful in 51 of 53 patients (96.2%). For the entire cohort, the median operative time was 7 min (range: 2-30), and the median interval to β-hCG negativization was 11 days (range: 6-45). The overall major complication rate was 3.8% (n = 2). One case was deemed unsuccessful due to conversion to laparotomy following uterine perforation during cervical dilation. Another patient, diagnosed with persistent trophoblastic disease requiring methotrexate (MTX) therapy, was also considered a treatment failure. Operative time was significantly longer in patients with Type II CSP compared with Type I (median 9 min vs. 5 min; p = 0.0004). Conclusions: Hysteroscopic mechanical tissue removal as a primary treatment for cesarean scar pregnancy represents an effective and safe "one-step" approach, characterized by a high success rate, rapid β-hCG resolution, and a low incidence of complications. This fertility-preserving, minimally invasive technique may be considered a primary treatment option for hemodynamically stable patients with CSP, provided that appropriate patient selection is undertaken and sufficient surgical expertise is available.