Objective: To describe three-dimensional ultrasonographic features of an ectopic pregnancy in a cesarean scar.
Design: Description of a case.
Setting: Case report of one patient.
Patient(s): A 38-year-old women with three previous cesarean deliveries.
Intervention(s): Three-dimensional ultrasonography was performed for diagnosis and treatment.
Main outcome measure(s): Local administration of methotrexate under ultrasonographic guidance.
Result(s): Ultrasonographic study revealed a gestational sac in the anterior wall of the uterine isthmus with peritrophoblastic flow. It was treated conservatively and successfully with local methotrexate administration under ultrasonographic guidance.
Conclusion(s): The early diagnosis of ectopic cesarean scar pregnancy allows the conservative treatment with local administration of methotrexate under ultrasonographic guidance.