Scar Pregnancy and Extrauterine Implants

Cesarean scar pregnancy (CSP) is a rare occurrence consisting in the implantation of the embryo within the myometrium of a prior cesarean delivery scar. The CSP could be a dangerous condition for women because of the related complications such as placenta previa or accreta, uterine rupture, and hemorrhage. Therefore, early diagnosis and rapid treatment are crucial. Extrauterine implants or ectopic pregnancy (EP) consists in the implantation of an embryo in a site other than the endometrium of the uterine cavity. It occurs in 1%-2% of all reported pregnancies. The most common extrauterine location is the fallopian tube, which represents 96% of cases. The diagnosis of CSP and EP is based on history, clinical examination, levels of serum β-human chorionic gonadotropin (β-hCG), and ultrasonography findings. In last 20 years, new treatments were developed, varying from medical management, minimally invasive surgical approach and local treatment including systemic or local infusion of metotrexate (MTX), and uterine artery embolization (UAE). UAE has been used widely to control hemorrhage and preserve the uterus and it is considered an affective adjuvant treatment of CSP and EP, especially associated with other therapies.