Abstract: Objective To identify the clinical features treatment effects risk factors differential diagnosis and treatment of the intramural pregnancy. Methods Retrospective analysis the history of surgery clinical features auxiliary examination diagnosis treatment and pathologic result on 4 patients admitted to our hospital with intramural pregnancy in 5 years. To understand the risk factors differential diagnosis and treatment of the intramural pregnancy. Result Four patients all belong to the mass type of the intramural pregnancy. B-mode MRI diagnoses pregnancy in uterine horn and gestational trophoblastic neoplasia. All of the four patients accept hysteroscopy combined with laparoscopy surgery and supervise HCG drop to the normal level. Conclusions In the clinical doctor should pay attention to the patient of incomplete abortion,HCG can not drop to the normal level or increase,vaginal bleeding and B-mode MRI according to mesometrium mass .

Key words: intramural pregnancy, gestational trophoblastic neoplasia, differential diagnosis, diagnosis, treatment