<prompt> Which of the following is not a sonographic criterion for cesarean scar pregnancyAnterior uterine isthmic massHourglass uterine shapeEmpty cervical canalHyperechoic thin endometrial stripe  <response>: Sonographic criteria for cesarean scar pregnancy include Empty uterine cavity - bright hyperechoic endometrial stripeEmpty cervical canalIntrauterine mass seen in anterior part of uterine isthmus. 