患者女,16岁。自述发现阴道内肿块半年余,肿块脱出伴阴道内褐色分泌物半月余。1年前行甲状腺腺瘤切除术,现复查甲状腺功能正常。患者既往月经规律,无性生活史,经腹妇检未扪及明显肿块;经腹超声显示宫颈下方有6cm×6cm×3cm的肿块,肿块内见多个不规则囊性回声,子宫及附件未见明显异常(图1)。后行经直肠腔超声增强造影,发现阴道内均匀性等增强囊性肿瘤,肿块与阴道壁界限清 Female patient, 16 years old. Read more than six months found vaginal mass, with prolapse of the vaginal secretions brown more than half a month. A year ago line thyroidectomy, thyroid function is now normal review. The patient’s past menstrual cycle, asexual life history, abdominal palpable undetectable palpable mass; transabdominal ultrasonography showed a 6cm × 6cm × 3cm mass below the cervix, see a number of irregular cystic mass within the echo, the uterus and annex no Obvious abnormalities (Figure 1). After transrectal ultrasound enhanced contrast and found that intravaginal uniformity and other cystic tumors to enhance the tumor and vaginal wall limit clear