Breat Pleomorphic Lobular Carcinoma In Situ
刘正智 赵明
更新时间:2020-10-11 17:21:00
同义词(或曾用名):乳腺小叶肿瘤、乳腺多形性小叶原位癌、乳腺经典型小叶原位癌
概述:
发病部位:乳腺
诊断要点:
1,多形性LCIS占所有乳腺小叶肿瘤的2.7 - 4.4%,但在实际工作中可能存在诊断不足,部分病例可能被无误诊为DCIS;
2,常见于绝经期后女性,较经典型LCIS发病年龄大,平均发病年龄 52 - 55岁;
3,大体上表现为纤细的颗粒状,常见微钙化;
4,镜下,受累小叶明显的膨胀,充满中等至较大的分布均匀且黏附性差的瘤细胞,胞浆中等量至丰富,强嗜酸性或颗粒状,核浆比高,常见胞浆内空泡伴或不伴有黏液蓄积,部分瘤细胞可表现出明显的印戒状;
5,瘤细胞核四倍以上于淋巴细胞大小,偏位,显示明显的多形性(2-3倍以上核大小的差异),核仁明显;
6,染色质粗糙,核分裂象活跃;
7,可见双核或多核瘤细胞;
8,肿瘤中央常见粉刺性坏死或伴有钙化;
9,部分瘤细胞可见透明细胞改变,部分肿瘤细胞可见胖梭形表现类似于肌纤维母细胞;
10,部分病例可表现为大汗腺分化特征,称之为大汗腺型多形性LCIS,瘤细胞可见丰富的嗜酸性、颗粒状胞浆伴有显著的核仁;
11,手术切除标本中多数有伴随的浸润性癌,包括经典型或多形性浸润性小叶癌以及浸润性导管癌。
免疫组织化学染色:
分子标记:
鉴别诊断:
高级别DCIS: 无胞浆内空泡、黏液或印戒细胞样特征,E-cadherin阳性;
大汗腺型DCIS: 倾向于小叶累及,E-cadherin阳性。
预后:
治疗:
参考文献:
Khoury T, Karabakhtsian RG, Mattson D, Yan L, Syriac S, Habib F, Liu S, Desouki MM. Pleomorphic lobular carcinoma in situ of the breast: clinicopathological review of 47 cases. Histopathology. 2014 Jun;64(7):981-93.
Chen YY, Hwang ES, Roy R, DeVries S, Anderson J, Wa C, Fitzgibbons PL, Jacobs TW, MacGrogan G, Peterse H, Vincent-Salomon A, Tokuyasu T, Schnitt SJ, Waldman FM. Genetic and phenotypic characteristics of pleomorphic lobular carcinoma in situ of the breast. Am J Surg Pathol. 2009 Nov;33(11):1683-94.
Blanco LZ, Thurow TA, Mahajan A, Susnik B, Helenowski I, Chmiel JS, Sullivan ME. Multinucleation is an objective feature useful in the diagnosis of pleomorphic lobular carcinoma in situ. Am J Clin Pathol. 2015 Nov;144(5):722-6.
Ginter PS, D'Alfonso TM. Current Concepts in Diagnosis, Molecular Features, and Management of Lobular Carcinoma In Situ of the Breast With a Discussion of Morphologic Variants. Arch Pathol Lab Med. 2017 Dec;141(12):1668-1678.
Calhoun BC, Collie AM, Lott-Limbach AA, Udoji EN, Sieck LR, Booth CN, Downs-Kelly E. Lobular neoplasia diagnosed on breast Core biopsy: frequency of carcinoma on excision and implications for management. Ann Diagn Pathol. 2016 Dec;25:20-25.