乳腺浸润性微乳头状癌4例临床病理特征

【关键词】 ,乳腺肿瘤

Clinical and pathological characteristics of invasive micropapillary carcinoma of the breast: 4 cases report。

【Abstract】 AIM: To observe the clinical and pathological characteristics of 4 cases with invasive micropapillary carcinoma (IMPC) of the breast and in combination with literatures to explore the pathomorphological features, diagnosis, differential diagnosis, immunohistochemical features and prognosis of IMPC. METHODS: Immunohistochemical SP method and light microscopy were adopted to make an observation and analysis for the 4 IMPC cases based on literatures. RESULTS: Compared with infiltrating ductal carcinoma,the 4 IMPC cases were not significantly different in clinical symptoms, signs and general checkup. What was observed under a light microscope included: tumor cells were mulberry and micropapillaryshaped or it was of glandule tubular arrangement; there was obvious interspace between cancer nest and neighboring areas; micropapillary was empty of fiber blood vessel axes; immunohistochemical staining showed EMA positive location was both at outward surface of glandule duct and at micropapillarylike cancer nest. CONCLUSION: IMPC is a kind of rare invasive breast cancer with such biologic behaviors as a strong attacking on lymphatic and high probability of lymph node transfer and poor prognosis.

【Keywords】 breast neoplasms; adenocarcinoma, papillary; invasive carcinoma。

【摘要】 目的: 观察4例乳腺浸润性乳头状癌(IMPC)的临床病理学特点,结合文献探讨乳腺浸润性乳头状癌的病理形态学特征、诊断、鉴别诊断及免疫组化特点和预后. 方法: 采用光镜免疫组化SP法对4例IMPC进行观察并结合文献分析. 结果: 4例乳腺IMPC与浸润性导管癌相比无特殊的临床症状、体征及大体检查.光镜下特征性表现为肿瘤细胞呈桑椹状、微乳头状或小腺管样排列,癌巢与周围间质形成明显的空隙. 微乳头缺乏纤维血管轴心. 免疫组化染色EMA阳性部位在癌细胞巢团或微乳头状、腺管的外表面. 结论: 浸润性乳头状癌是一种少见类型的浸润性乳腺癌,具有淋巴管侵袭性强、淋巴结转移率高、预后差的生物学行为.

【关键词】 乳腺肿瘤;腺癌,乳头状;浸润癌。

0引言。

乳腺浸润性乳头状癌(invasive micropapillary carcinoma, IMPC),以往只是被作为浸润性导管癌的一种特殊形态学表现,而近年来由于其生物学行为表现与一般浸润性导管癌不同,具有明显的淋巴管侵袭性、高淋巴结转移率和预后差等特性,故引起国内外越来越多学者的重视[1—3]. 2003年WHO乳腺癌新分类将其归为乳腺上皮性肿瘤独立一型. 本组报道4例,并结合文献分析其临床病理学特点.

1对象和方法。

1.1对象IMPC 4例,3例为西安交通大学第一医院手术切除标本,1例为外院会诊病例.  1.2方法标本经甲醛液固定,常规脱水,石蜡包埋切片,HE染色光镜观察;免疫组化检查一抗为CK, EMA, ER, PR, NSE, CgA, Syn, CerbB2, P53,采用SP法,试剂购自福州迈新生物技术开发公司和上海长岛生物公司.

2结果。

2.1临床资料本组4例均为女性,患者年龄43~74(平均58.8)岁,均以发现右侧乳腺肿块为主诉就诊,病程14 d~1 a. 肿块位于乳腺外上象限3例,位于内上象限1例,乳头无明显下陷. 4例同侧腋窝均可触及肿大的淋巴结. 行乳腺癌改良根治切除术3例,行肿块单纯切除术1例. 患者均无明确内脏病灶. 随访0.5~2 a,均未发现复发或远处转移.  2.2病理学检查肿瘤呈结节状,直径2~5(平均3.8) cm. 切面呈灰白色,质硬,界限不清,大多数呈浸润性生长. 部分肿瘤可见淡黄色小灶状坏死. 组织学观察肿瘤细胞排列成微小乳头状、桑椹状或圆形、卵圆形及不规则大小不等的细胞巢团,边缘粗糙毛刺样,乳头中心缺乏纤维血管轴心(图1A). 有些肿瘤细胞排列成小腺管样结构,其边缘也不光滑,呈毛刺样(图1B). 癌细胞巢周围为细网状纤维组织间质,内含丰富血管和淋巴管. 癌细胞巢与周边纤维组织间有类似腺管的无细胞间隙,间隙内空虚,由纤细的纤维组织分隔(图1C).以上结构占整个肿瘤组织85%~90%. 肿瘤细胞呈柱状或立方状,胞质红染,细颗粒状,核呈圆形或卵圆形,染色较深,核仁不明显,细胞核有轻中度的异型性,核分裂象易见. 肿瘤细胞巢呈浸润性生长,间质呈细网状纤维结缔组织,并伴有少量淋巴细胞浸润. 本组4例在同侧腋窝肿大的淋巴结内均可见癌转移,最多达10/18个. 转移癌形态与原发灶癌巢形态相同,都保持相同的癌巢或微乳头状形态结构.  2.3免疫组织化学染色CK(+),EMA癌细胞巢团或乳头、腺管表面(+)(图1D),2例NSE(+),2例ER(+),1例PR(+),CerbB2阳性率65%~90%, P53 阳性率50%~85%,CgA(—),Syn(—).

A: 肿瘤细胞呈桑椹状、微乳头状排列HE ×100;B: 肿瘤细胞呈小腺管样排列HE ×200;C: 肿瘤巢周无细胞间隙HE ×100;D: 癌细胞巢表面EMA阳性反应SP法 ×200.

0 次访问