A Novel Treatment for Cervical and Cesarean Section Scar Pregnancies by Transvaginal Injection of Absolute Ethanol to Trophoblasts: Efficacy in 19 Cases.

Study Objective: To evaluate the efficacy of a nonsurgical treatment for cervical pregnancy (CP) and cesarean section scar pregnancy (CSP).

Design: Retrospective clinical study (Canadian Task Force classification III).

Setting: Private assisted reproductive technology practice.

Patients: Nineteen women with CP (n = 16) or CSP (n = 3), including 6 patients with positive fetal heartbeat.

Intervention: Transvaginal local injection of absolute ethanol (AE) into the hyperechoic ring (lacunar space) around the gestational sac under ultrasound guidance.

Measurements And Main Results: Serum beta-human chorionic gonadotropin (β-hCG) was measured at frequent intervals, and ultrasound and/or magnetic resonance imaging was used to observe the gestational sac. In 9 patients, the serum β-hCG level was effectively reduced with a single AE injection at 2 hours. In the remaining 10 patients, the level decreased but then increased in 4 and slowly decreased in the other 6; all of these 10 patients required 2 to 5 repeat AE injections. In all patients, serum β-hCG level was reduced by 50% within 3 days and decreased to <10% of the initial level within 14 days. In 18 patients (95%), the level was decreased to 1.0 mIU/mL within 40 days. Seven patients were treated on an outpatient basis. Twelve patients received no anesthesia. Five patients subsequently became pregnant, and each had a live birth. There was no recurrent CP or CSP. The procedure was successful in all 19 patients.

Conclusion: This procedure is an effective treatment for CP or CSP that could be used in place of conventional surgical interventions and medical treatment using MTX.