Background:The differential diagnosis of mucoepidermoid carcinoma(MEC)from neoplasm undergoing mucinous features brings more pitfalls to pathologists.Combining specific MAML2 gene rearrangement and histological charac...Background:The differential diagnosis of mucoepidermoid carcinoma(MEC)from neoplasm undergoing mucinous features brings more pitfalls to pathologists.Combining specific MAML2 gene rearrangement and histological characteristics may be the solution.Methods:Twenty-five tumors with mucinous components were selected for differential diagnosis of MEC.All the cases were detected for MAML2 gene rearrangement.The cases diagnosed as MEC were classified into four variants:classic,oncocytic,Warthin-like,and nonclassified,and they were graded using the Brandwein system.The histological characteristics of non-MECs were summarized for differential diagnosis.Univariate survival analysis was performed on MECs.Results:There were 16 MECs;62.5%were MAML2 rearranged.For the low-,intermediate-,and high-grade MECs,the rate of rearrangement was 83.3%,100%,and 28.6%,respectively.Both the oncocytic and Warthinlike MECs were MAML2 rearranged.For the classic and nonclassified MECs without MAML2 rearrangement,non-keratinized squamoid cells and distinctive mucinous cells were essential diagnostic criteria.On survival analysis,all the disease progression occurred in high-grade MECs(p=0.038).Nine cases were diagnosed as non-MECs:pleomorphic adenoma with mucinous metaplasia showed no ex-capsular involvement;metaplastic Warthin tumor appeared with overt keratinization and residual oncocytic bilayered epithelium;mix squamous cell and glandular papilloma showed an endobronchial papillary growing pattern;adenosquamous carcinoma was accompanied by squamous carcinoma in situ of the overlying mucosa.All the non-MECs were negative for MAML2 rearrangement.Conclusion:The application of combining MAML2 rearrangement and histological characteristics is helpful in the differential diagnosis between MEC and other tumors with mucinous components.展开更多
The central nervous system plays an important role in regulating thyroid hormone homeostasis. 5-HT is one of the important neurotransmitters involved in energy balance regulation. 5-HT transporters affect 5-HT functio...The central nervous system plays an important role in regulating thyroid hormone homeostasis. 5-HT is one of the important neurotransmitters involved in energy balance regulation. 5-HT transporters affect 5-HT function by regulating SERT protein expression and transcriptional activity. Based on the biological correlation between thyroid hormone and thyroid tumors, 5-HTTLPR is associated with thyroid tumors under stress. Animal models of thyroid disease have shown that some of the transmitters in the brain’s monoaminergic nervous system have changed, and when the monoamine transporter gene expression is altered, it is found that this disorder is more pronounced. This article discusses whether thyroid papillary carcinoma patients are associated with 5-HTTLPR and whether the mechanism of thyroid papillary carcinoma “gene x environment” has an effect. Briefly describe the role of 5-HTTLPR in the development of patients with papillary thyroid carcinoma, and provide a basis for clinical diagnosis and treatment of papillary thyroid cancer.展开更多
目的探讨脉络丛癌(CPC)的临床病理及免疫组化特征。方法收集首都医科大学宣武医院诊断的CPC共10例,总结临床病例资料、组织学以及免疫组化特征,并进行文献复习。结果10例CPC发病部位以脑室居多,侧脑室及四脑室总占比60%;其次散发在枕叶...目的探讨脉络丛癌(CPC)的临床病理及免疫组化特征。方法收集首都医科大学宣武医院诊断的CPC共10例,总结临床病例资料、组织学以及免疫组化特征,并进行文献复习。结果10例CPC发病部位以脑室居多,侧脑室及四脑室总占比60%;其次散发在枕叶、顶叶、脑干及鞍区,占比40%。年龄0.7~14岁,中位年龄为3.0岁;男性4例,女性5例;均有不同程度的中枢神经系统疾病表现,常见为嗜睡、哭闹、头痛及脑积水等症状。影像学表现为孤立性实性肿物,镜下符合2021版CNS WHO CPC诊断标准。免疫组化表型中EMA均表现为灶状阳性,GFAP、CK、CK7和CK20均有各自比例的阳性值和阳性结果,Ki-67增殖指数为15%~50%,INI-1未见缺失。特异性较强的两个指标:Kir7.1细胞膜及细胞质表达,阳性细胞数为80%,其中1例阳性细胞数低于50%;TTR在细胞质中表达,阳性细胞数为60%。结论CPC是一种罕见的、生长迅速的、好发于婴幼儿的恶性肿瘤,EMA、GFAP、CK、CK7及CK20表达有一定的规律,Kir7.1和TTR诊断CPC特异性较强,鉴别诊断婴幼儿中枢神经系统恶性肿瘤具有一定的临床价值。展开更多
基金Beijing Hope Run Special Fund of Cancer Foundation of China(Grant/Award Number: LC2018A19)
文摘Background:The differential diagnosis of mucoepidermoid carcinoma(MEC)from neoplasm undergoing mucinous features brings more pitfalls to pathologists.Combining specific MAML2 gene rearrangement and histological characteristics may be the solution.Methods:Twenty-five tumors with mucinous components were selected for differential diagnosis of MEC.All the cases were detected for MAML2 gene rearrangement.The cases diagnosed as MEC were classified into four variants:classic,oncocytic,Warthin-like,and nonclassified,and they were graded using the Brandwein system.The histological characteristics of non-MECs were summarized for differential diagnosis.Univariate survival analysis was performed on MECs.Results:There were 16 MECs;62.5%were MAML2 rearranged.For the low-,intermediate-,and high-grade MECs,the rate of rearrangement was 83.3%,100%,and 28.6%,respectively.Both the oncocytic and Warthinlike MECs were MAML2 rearranged.For the classic and nonclassified MECs without MAML2 rearrangement,non-keratinized squamoid cells and distinctive mucinous cells were essential diagnostic criteria.On survival analysis,all the disease progression occurred in high-grade MECs(p=0.038).Nine cases were diagnosed as non-MECs:pleomorphic adenoma with mucinous metaplasia showed no ex-capsular involvement;metaplastic Warthin tumor appeared with overt keratinization and residual oncocytic bilayered epithelium;mix squamous cell and glandular papilloma showed an endobronchial papillary growing pattern;adenosquamous carcinoma was accompanied by squamous carcinoma in situ of the overlying mucosa.All the non-MECs were negative for MAML2 rearrangement.Conclusion:The application of combining MAML2 rearrangement and histological characteristics is helpful in the differential diagnosis between MEC and other tumors with mucinous components.
文摘The central nervous system plays an important role in regulating thyroid hormone homeostasis. 5-HT is one of the important neurotransmitters involved in energy balance regulation. 5-HT transporters affect 5-HT function by regulating SERT protein expression and transcriptional activity. Based on the biological correlation between thyroid hormone and thyroid tumors, 5-HTTLPR is associated with thyroid tumors under stress. Animal models of thyroid disease have shown that some of the transmitters in the brain’s monoaminergic nervous system have changed, and when the monoamine transporter gene expression is altered, it is found that this disorder is more pronounced. This article discusses whether thyroid papillary carcinoma patients are associated with 5-HTTLPR and whether the mechanism of thyroid papillary carcinoma “gene x environment” has an effect. Briefly describe the role of 5-HTTLPR in the development of patients with papillary thyroid carcinoma, and provide a basis for clinical diagnosis and treatment of papillary thyroid cancer.
文摘目的探讨脉络丛癌(CPC)的临床病理及免疫组化特征。方法收集首都医科大学宣武医院诊断的CPC共10例,总结临床病例资料、组织学以及免疫组化特征,并进行文献复习。结果10例CPC发病部位以脑室居多,侧脑室及四脑室总占比60%;其次散发在枕叶、顶叶、脑干及鞍区,占比40%。年龄0.7~14岁,中位年龄为3.0岁;男性4例,女性5例;均有不同程度的中枢神经系统疾病表现,常见为嗜睡、哭闹、头痛及脑积水等症状。影像学表现为孤立性实性肿物,镜下符合2021版CNS WHO CPC诊断标准。免疫组化表型中EMA均表现为灶状阳性,GFAP、CK、CK7和CK20均有各自比例的阳性值和阳性结果,Ki-67增殖指数为15%~50%,INI-1未见缺失。特异性较强的两个指标:Kir7.1细胞膜及细胞质表达,阳性细胞数为80%,其中1例阳性细胞数低于50%;TTR在细胞质中表达,阳性细胞数为60%。结论CPC是一种罕见的、生长迅速的、好发于婴幼儿的恶性肿瘤,EMA、GFAP、CK、CK7及CK20表达有一定的规律,Kir7.1和TTR诊断CPC特异性较强,鉴别诊断婴幼儿中枢神经系统恶性肿瘤具有一定的临床价值。
