摘要
罗道病(RDD)是一种好发于双侧颈部淋巴结的少见、特发性的良性组织细胞增生性疾病。其中,单纯累及乳房的病例较罕见,且多为乳腺单发。本文报道了1例年轻女性乳腺RDD患者的诊疗过程,旨在提高临床医生对该疾病的认识以避免误诊、漏诊。
患者为37岁的女性,因发现左乳肿物3年入院。体格检查示左乳外下象限约5~6点方位可扪及一大小约3 cm×3 cm的肿块,边界较清,质硬,活动度一般,未触及淋巴结。综合其高度恶性等级的影像学检查(乳腺彩超、乳腺钼靶、乳腺MRI)结果,临床诊断考虑为左乳乳腺癌可能性大。予以行“彩超引导下左乳肿物活检术”,病理诊断考虑为肉芽肿性乳腺炎。随后进行“左乳病损切除术”,通过免疫组织化学检查结果,即S-100(+),CD68(+),CD163(+)和CD1α(-),排除了肉芽肿性乳腺炎的初步诊断,该患者最终被确诊为乳腺RDD。
关键词
罗道病(Rosai-Dorfman disease,RDD)又称窦组织细胞增生伴巨大淋巴结病(sinus histiocytosis with massive lymphadenopathy,SHML),是一种少见、特发性的良性组织细胞增生性疾病;1965年由Destombes首次描述,Rosai和Dorfma
患者 女,37岁,因“发现左乳肿物3年”入院;入院前3年无意间发现左乳外下象限有1个约“花生”大小的肿物,局部无红肿,不伴有乳房疼痛、乳头溢液,因自觉该肿物增大就诊于湘雅医院。既往史及个人史均无特殊。家族史:母亲患有白血病,姑姑患有黑色素瘤。专科查体:左乳外下象限约5~6点方位可扪及一大小约3 cm×3 cm的肿块,边界较清,质硬,活动度一般,表面皮肤可见少许水肿;右乳、双侧腋窝、双侧锁骨上、下及颈部均未扪及明显结节。入院后完善(血、尿、粪便)三大常规、甲状腺功能三项、凝血功能、肝肾功能、输血前四项、血型、性激素全套等检验项目,结果均未见明显异常;乳腺彩超(

图1 影像学资料 A:乳腺彩超示左乳4点方位腺体内探及一32 mm×20 mm×23 mm低回声肿块,形态不规则,边界不清,内光点粗,分布欠均匀,内可见多个细小强光点,结节内可见丰富的血流信号;B:乳腺增强MRI示左乳外下象限3~5点钟方位可见一不规则肿块,呈等T1、稍长T2信号,DWI呈高信号,ADC呈低值,大小约35 mm×29 mm×31 mm,病灶边界欠清,增强后内部呈不均匀的明显环形强化;C-D:乳腺钼靶(分别为左乳轴位和左乳内斜位),左乳外下象限内见一不对称类圆形高密度影,边界清晰,大小约26 mm×21 mm,内未见明显钙化影,腋下可见淋巴结影,较大者短径约12 mm
综合该患者临床表现及影像学检查,高度怀疑其患有左乳乳腺癌;遂在局麻下行“彩超引导下左乳肿物活检术”。病理镜下观:上皮样细胞及较多炎性细胞增生;免疫组化:CK-Pan(-),CD68(+),Ki-67(5%),病理诊断:考虑为肉芽肿性乳腺炎;排除手术禁忌后,于2022年3月2日在全麻下行“左乳病损切除术”,肉眼观:肿物切面呈灰白灰黄色,可见出血,未见坏死,质韧;镜下HE(苏木精-伊红)染色(

图2 手术标本病理图片 A:HE染色图片(×20),组织细胞胞质中可见完整的淋巴细胞,浆细胞等;B-L:乳腺RDD免疫组织化学图片(×20),分别代表S100(+)、CD163(+)、CD68(+)、CD1α(-),CK-Pan(-),CK7(-),Ki-67(5%),LCA(+),vimentin(+),desmin(-),myogenin(-)
RDD通常被认为是一种良性疾病,但目前其病因尚未完全明确,常被认为可能与免疫系统失调、病毒感染(如疱疹病毒6、EB病毒、HIV等)、Fas/FasL信号传导通路破坏等有
1990年,Foucar
有研究针对乳腺RDD与乳腺癌的影像学检查结果进行了对比,如在乳腺彩超方面,乳腺RDD病灶的周围组织回声增高与乳腺浸润性癌的周边高回声晕有区别,RDD周围组织回声增高的范围更广、更弥散,这可能与大量的淋巴细胞及浆细胞浸润有关,而乳腺浸润性癌是由于癌灶向周围组织浸润,并伴有不同的间质反应所
但由于乳腺RDD的临床表现与乳腺癌相似,均表现为无痛、可触及的肿块,且影像学检查所示的多个恶性征象使其BI-RADS分类在高恶性风险类别,尤其是乳房肿物并伴腋窝淋巴结受累的病例,更容易被临床诊断为乳腺恶性肿
病理学检查是确诊RDD的金标准,且RDD的病理学特征与其病变发生的位置关系并不大,RDD典型的镜下病理特征为具有“水样清澈”细胞质、淡然核及突出的核仁的大的组织细胞。通常可以见到淋巴细胞和浆细胞通过细胞质运输进入到组织细胞中,此特征性表现称为“伸入”现象,免疫组化结果为S-100(+),CD68(+),CD163(+)和CD1α(-
由于RDD的病因、发病机制不明,且临床表现具有高度异质性,目前没有统-的治疗方法。既往文
综上所述,乳腺RDD患者的临床表现及影像学表现与乳腺癌类似,仅靠临床表现和影像学检查难以进行诊断与鉴别诊断,增加了其治疗的难度,最终仍需通过手术病理确诊。本篇回顾性分析了1例经乳腺病损切除术后病理确诊为乳腺RDD的年轻女性病例并对RDD相关的文献进行了复习,旨在提高临床医生对该疾病的认识;同时,建议对乳腺RDD患者进行综合评估,包括详细的病史、专科检查、影像学检查、实验室检验,病理学诊断及长期随访,以进一步明确该疾病的发展程度和患者潜在的并发疾病,并且笔者认为手术干预是确诊以及治疗本疾病的首选方式。
作者贡献声明
王潇潇负责数据收集、论文撰写及投稿;肖志负责辅助文稿的撰写、辅助分析临床及影像学资料;陈雨诗负责核实、扫描并分析病理图片;廖立秋负责文章修改;廖立秋、肖志、王潇潇为手术实施者。
利益冲突
所有作者均声明不存在利益冲突。
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