Uterine intravenous leiomyomatosiswas a rare type of uterus tumors. Because ofthe lack of knowledge about the ultrasonic patterns of this kind of disease, misdiagnosis frequently happens. Reviewing the cases and relevant researcheswas helpful to understand the disease and figure it out inultrasonic images.

Six cases of patients with uterine intravenous leiomyomatosis were reviewed which werehospitalized in Beijing Obstetrics and Gynecology Hospital during 2014 to 2016. All of the patients underwentultrasound examinations before surgery. The ultrasound findings,clinical presentations and pathological features of the 6 patients were evaluated.

In 6 patients with uterine intravenous leiomyomatosis, 3 cases were solid tumors, located in the cervix region and para uterine region, withirregular veinvascular inside; 3 cases performance as multiple tumorlocated in dilated uterine vein, active tumor embolus were found in inferior vena cavain one of the 3 cases.

Uterine intravenous leiomyomatosisis found to be a solid mass located in the cervix region and para uterine region. The internal fissure of solid tumor is an important feature. Tumor extending to the iliac vein and inferior vena cava in some cases. Thusit is hard to be diagnosed before surgery by ultrasonography. Moreover, transvaginal ultrasound combined with inferior vena cava ultrasonography and echocardiography has a more obvious advantage in the diagnosis of the uterine intravenous leiomyomatosis.