secretory carcinoma of thyroid
夏成青
更新时间:2021-01-01 16:23:53
概述:
诊断要点:
1. 罕见,平均发病年龄59岁(36-74岁),女性发病明显占优势(男女比例2:9);
2. 肿瘤通常体积较大(2.4-7.6cm),实性,界限不清,呈浸润性生长方式,切面灰白-棕黄色,发现时常侵犯甲状腺外;
3. 形态学类似涎腺分泌性癌,结构多样,筛状、微囊、实性、梁状、乳头、假乳头等均可出现;
4. 腺腔内可见嗜酸性或弱嗜碱性分泌物,分泌物周围偶见空隙或呈扇贝样;
5. 肿瘤细胞多角形,常形态一致,核浆比例低或中等,胞浆丰富,嗜酸性,呈颗粒状、小泡状或空泡状,胞浆内有嗜酸性分泌物。
6. 核圆形到卵球形,染色质泡状。核膜不规则和核沟可能很明显,核内假包涵体很少见,但也可以看到。核仁通常是单一的,突出的,位于细胞中央,可为嗜酸性的;
7. 间质常见致密的玻璃样变或纤维化;
8. 少数病例核分裂活跃伴坏死。
免疫组织化学染色:
1. TTF-1和TG阴性,而 mammaglobin (乳腺球蛋白)和S100(9/10)阳性,染色可呈斑片状,强弱不等;
2. 肿瘤细胞GCDFP-15可呈阳性;
3. 有9/10(90%)的病例中发现PAX8免疫反应,通常呈局灶性和弱反应;
4. 6例中有5例(83%)的肿瘤细胞显示GATA3的灶性表达;
5. 腔内分泌物PAS和mucicarmine阳性。
分子标记:
鉴别诊断:
预后:
治疗:
参考文献:
1. Stevens TM, Kovalovsky AO, Velosa C, et al. Mammary analog secretory carcinoma, low-grade salivary duct carcinoma, and mimickers: a comparative study. Mod Pathol. 2015;28:1084–1100.
2. Desai MA, Mehrad M, Ely KA, Secretory Carcinoma of the Thyroid Gland: Report of a Highly Aggressive Case Clinically Mimicking Undifferentiated Carcinoma and Review of the Literature. Head Neck Pathol. 2019 Dec;13(4):562-572
3. Reynolds S, Shaheen M, Olson G, Barry M, Wu J, Bocklage T. A case of primary mammary analog secretory carcinoma (MASC) of the thyroid masquerading as papillary thyroid carcinoma: potentially more than a one off. Head Neck Pathol. 2016;10:405–413
4. Desai MA, Mehrad M, Ely KA, Bishop JA, et al.Secretory Carcinoma of the Thyroid Gland: Report of a Highly Aggressive Case Clinically Mimicking Undifferentiated Carcinoma and Review of the Literature. Head Neck Pathol. 2019 Dec;13(4):562-572.