双子宫、双阴道畸形合并子宫腺肉瘤一例

2019-11-29 邵硕 郑宁 刘文娟 临床放射学杂志

患者女,17岁。因阴道分泌物6个月余,加重伴阴道突出物1周入院。14岁初潮,月经规律,月经量中等。妇科检查:外阴发育正常,处女膜孔呈圆形,用力时见处女膜孔处约1 cm紫红色息肉样物突出。直肠腹部诊:直肠黏膜光滑,进指顺利,扪及盆腔偏右侧直径约5 cm包块,边界欠清,活动差,与子宫分界不清。

患者女,17岁。因阴道分泌物6个月余,加重伴阴道突出物1周入院。14岁初潮,月经规律,月经量中等。妇科检查:外阴发育正常,处女膜孔呈圆形,用力时见处女膜孔处约1 cm紫红色息肉样物突出。直肠腹部诊:直肠黏膜光滑,进指顺利,扪及盆腔偏右侧直径约5 cm包块,边界欠清,活动差,与子宫分界不清。
 
MRI检查示双宫体、宫颈及阴道,偏右侧宫颈及阴道内见软组织肿块,T1WI呈低信号夹杂小片状高信号,T2WI呈混杂高低信号,病灶范围约4.6 cm×4.3 cm×4.0 cm(图1),增强扫描呈明显不均匀强化(图2)。双侧卵巢生理性卵泡,盆腔少量积液。



图1冠状位T2WI示双子宫、双阴道,右侧宫颈及阴道内见高低混杂信号;图2冠状位T1WI增强扫描示双子宫、双阴道,右侧宫颈及阴道肿块呈明显不均匀强化;
 
手术:静脉麻醉下行宫腔镜检查术+宫颈肿瘤摘除术,术中见环形处女膜,孔道松弛,肿瘤位于右侧宫颈管近外口处,充满右侧阴道,蒂较细;左侧宫颈、阴道未见异常。摘除宫颈赘生物,质韧,呈黄色透明胶质状。
 
病理检查:显微镜下由良性腺上皮成分和肉瘤性间质成分构成(图3),被覆上皮下方的间质细胞密集排列,多呈梭形,异型性明显,核分裂常见,伴横纹肌分化。免疫组织化学:肌细胞生成素(Myogenin)阳性,成肌细胞决定基因1(MyoD1)阳性,结蛋白(Desmin)阳性,CD10(+),细胞增殖指数(Ki-67)30%。病理诊断:低度恶性子宫腺肉瘤。



图3显微镜下可见良性腺上皮成分,被覆上皮下方的间质细胞密集排列(HE×40)
 
讨论
 
本例为双子宫、双宫颈、双阴道畸形合并一侧子宫颈腺肉瘤,国内外文献未见报道。双子宫畸形为胚胎中肾管(苗勒管)融合异常所致,其发生率约占子宫畸形的5%,形成两个单角子宫和两个宫颈,阴道也完全分开,也有双子宫、双宫颈、单阴道者。MRI检查软组织分辨力高,可清楚显示子宫的形态及宫体、宫颈、阴道的解剖结构,表现为两个子宫完全分离,有各自独立的宫腔及宫壁,其分层结构的信号与正常子宫相同,是诊断先天性子宫畸形的可靠方法。
 
子宫腺肉瘤是一种较少见的子宫肉瘤,多发生于绝经后女性,但发病年龄呈现年轻化趋势;子宫腺肉瘤87%起源于子宫内膜,9%起源于子宫颈,罕见起源于子宫肌层。子宫颈腺肉瘤主要发生在初潮后少女,表现为有蒂宫颈息肉样赘生物,偶有巨大包块占据整个宫颈,本例为发生于右侧子宫颈的带蒂赘生物突入右侧阴道。
 
需与以下疾病鉴别:(1)宫颈息肉,多较小,信号较均匀,增强扫描息肉强化程度与子宫肌层相似,呈中等强化;(2)外生型子宫颈癌,表现为结节状或不规则形肿块,信号不均,T1WI呈以等信号为主,T2WI呈稍高信号,增强扫描宫颈癌强化程度低于正常子宫,呈轻度强化。结合本例及文献报道子宫颈腺肉瘤多为混杂信号,增强扫描常表现不均匀明显强化。此外,该病的确诊主要依靠组织形态学特征,免疫组织化学标记主要用于确定异源性成分及与其他肿瘤的鉴别。本例子宫颈腺肉瘤组织学特征基本同发生在子宫体的腺肉瘤,由良性腺上皮成分和肉瘤性间质成分构成,腺上皮为Müllerian上皮系列,间质成分具有横纹肌肉瘤的特点。
 
原始出处:

邵硕,郑宁,刘文娟,齐先龙,李蕊.双子宫、双阴道畸形合并子宫腺肉瘤一例[J].临床放射学杂志,2018,37(06):1063.

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    2019-12-01 wushaoling
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    2019-11-30 拿着枪的小啰啰

    最后治疗方案呢

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