Cowden syndrome （CS）, an autosomal dominant disorder, is one of a spectrum of clinical disorders that have been linked to germline mutations in the phosphatase and tensin homolog （PTEN） gene. Although 70-80% of pa...Cowden syndrome （CS）, an autosomal dominant disorder, is one of a spectrum of clinical disorders that have been linked to germline mutations in the phosphatase and tensin homolog （PTEN） gene. Although 70-80% of patients with CS have an identifiable germline PTEN mutation, the clinical diagnosis presents many challenges because of the phenotypic and genotypic variations. In the present study, we sequenced the exons and the promoter of PTEN gene, mutations and variations in the promoter and exons were identified, and a PTEN protein expression negative region was determined by immunohistochemistry （IHC）. In conclusion, a novel promoter mutation we found in PTEN gene may turn off PTEN protein expression occasionally, leading to the disorder of PTEN and untypical CS manifestations.展开更多
10号染色体上磷酸酶和张力蛋白同源物(phosphatase and tensin-homolog deleted on chromosome 10,PTEN)是重要的抑癌基因,其突变可引发PTEN错构瘤肿瘤综合征(PTEN hamartoma tumor syndrome,PHTS),常被称为Cowden综合征,是较为罕见的...10号染色体上磷酸酶和张力蛋白同源物(phosphatase and tensin-homolog deleted on chromosome 10,PTEN)是重要的抑癌基因,其突变可引发PTEN错构瘤肿瘤综合征(PTEN hamartoma tumor syndrome,PHTS),常被称为Cowden综合征,是较为罕见的遗传性肿瘤综合征,其与早发性、多发性乳腺癌高度相关。本文报道3例PTEN基因突变相关单侧多中心乳腺癌及同时性、异时性双侧乳腺癌患者,并总结其临床表现、病理特征、诊治经验及随访情况,旨在为临床医生更好地诊治PTEN基因突变相关乳腺癌及Cowden综合征人群提供借鉴。展开更多
目的总结1例儿童Cowden综合征临床及基因突变特征并进行文献复习。方法回顾性分析2020年6月新乡医学院第一附属医院收治的1例Cowden综合征患儿临床资料,并以"Cowden综合征"、"PTEN基因"、"错构瘤息肉"、&...目的总结1例儿童Cowden综合征临床及基因突变特征并进行文献复习。方法回顾性分析2020年6月新乡医学院第一附属医院收治的1例Cowden综合征患儿临床资料,并以"Cowden综合征"、"PTEN基因"、"错构瘤息肉"、"儿童"、"Cowden syndrome and child"、"PTEN and child"为检索词,检索建库至2021年3月中文数据库(中国知网数据库、万方数据库)及PubMed数据库进行文献复习。结果患儿,男,13岁,间断腹痛、腹胀5个月就诊,儿童电子显微胃肠镜检查提示多发息肉,息肉组织活检见灶状淋巴细胞聚集浸润。全外显子测序发现患儿PTEN基因存在c.475(exon5)A>T杂合核苷酸变异,该变异导致第159号氨基酸由精氨酸变为色氨酸,通过蛋白三级结构预测发现该变异可能影响蛋白的空间结构,可能导致蛋白功能受到损害.结合患儿临床特点,确诊为Cowden综合征。家系验证变异遗传自母亲,母亲有类似表型。检索符合条件的中文文献0篇,与PTEN突变有关的41篇儿童病例报道的英文文献中,仅2篇报道与儿童Cowden综合征有关,该变异未见报道。结论本研究发现导致Cowden综合征的新的PTEN基因c.475(exon5)A>T突变位点,为国内首例儿童Cowden综合征病例报道。展开更多
<div style="text-align:justify;"> <span style="font-family:Verdana;"><strong>Objective:</strong> To describe the histological and immunohistochemical findings observed when ...<div style="text-align:justify;"> <span style="font-family:Verdana;"><strong>Objective:</strong> To describe the histological and immunohistochemical findings observed when studying a dysplastic cerebellar gangliocytoma observed in a 33-year-old man with a history of Thyroid Cancer. <strong>Material and Methods:</strong> Radiological images (MRI) and histological and immunohistochemical preparations obtained from the cerebellar tissue were received in our laboratory. <strong>Results:</strong> A neoplasm constituted by aberrant-looking mature neurons was observed that showed negativity for the immunohistochemical markers of the PTEN protein, expression of the activity of the PTEN gene. <strong>Conclusions:</strong> Verify the diagnosis of a rare entity, clearly related in scientific publications with Cowden’s Syndrome.</span> </div>展开更多
基金supported by National Natural Science Foundation of China (30970623)International Science and Technology Cooperation Projects (2010DFA31840 and 2010DFB33720)Beijing Natural Science Foundation(5112030)
文摘Cowden syndrome （CS）, an autosomal dominant disorder, is one of a spectrum of clinical disorders that have been linked to germline mutations in the phosphatase and tensin homolog （PTEN） gene. Although 70-80% of patients with CS have an identifiable germline PTEN mutation, the clinical diagnosis presents many challenges because of the phenotypic and genotypic variations. In the present study, we sequenced the exons and the promoter of PTEN gene, mutations and variations in the promoter and exons were identified, and a PTEN protein expression negative region was determined by immunohistochemistry （IHC）. In conclusion, a novel promoter mutation we found in PTEN gene may turn off PTEN protein expression occasionally, leading to the disorder of PTEN and untypical CS manifestations.
文摘10号染色体上磷酸酶和张力蛋白同源物(phosphatase and tensin-homolog deleted on chromosome 10,PTEN)是重要的抑癌基因,其突变可引发PTEN错构瘤肿瘤综合征(PTEN hamartoma tumor syndrome,PHTS),常被称为Cowden综合征,是较为罕见的遗传性肿瘤综合征,其与早发性、多发性乳腺癌高度相关。本文报道3例PTEN基因突变相关单侧多中心乳腺癌及同时性、异时性双侧乳腺癌患者,并总结其临床表现、病理特征、诊治经验及随访情况,旨在为临床医生更好地诊治PTEN基因突变相关乳腺癌及Cowden综合征人群提供借鉴。
文摘目的总结1例儿童Cowden综合征临床及基因突变特征并进行文献复习。方法回顾性分析2020年6月新乡医学院第一附属医院收治的1例Cowden综合征患儿临床资料,并以"Cowden综合征"、"PTEN基因"、"错构瘤息肉"、"儿童"、"Cowden syndrome and child"、"PTEN and child"为检索词,检索建库至2021年3月中文数据库(中国知网数据库、万方数据库)及PubMed数据库进行文献复习。结果患儿,男,13岁,间断腹痛、腹胀5个月就诊,儿童电子显微胃肠镜检查提示多发息肉,息肉组织活检见灶状淋巴细胞聚集浸润。全外显子测序发现患儿PTEN基因存在c.475(exon5)A>T杂合核苷酸变异,该变异导致第159号氨基酸由精氨酸变为色氨酸,通过蛋白三级结构预测发现该变异可能影响蛋白的空间结构,可能导致蛋白功能受到损害.结合患儿临床特点,确诊为Cowden综合征。家系验证变异遗传自母亲,母亲有类似表型。检索符合条件的中文文献0篇,与PTEN突变有关的41篇儿童病例报道的英文文献中,仅2篇报道与儿童Cowden综合征有关,该变异未见报道。结论本研究发现导致Cowden综合征的新的PTEN基因c.475(exon5)A>T突变位点,为国内首例儿童Cowden综合征病例报道。
文摘<div style="text-align:justify;"> <span style="font-family:Verdana;"><strong>Objective:</strong> To describe the histological and immunohistochemical findings observed when studying a dysplastic cerebellar gangliocytoma observed in a 33-year-old man with a history of Thyroid Cancer. <strong>Material and Methods:</strong> Radiological images (MRI) and histological and immunohistochemical preparations obtained from the cerebellar tissue were received in our laboratory. <strong>Results:</strong> A neoplasm constituted by aberrant-looking mature neurons was observed that showed negativity for the immunohistochemical markers of the PTEN protein, expression of the activity of the PTEN gene. <strong>Conclusions:</strong> Verify the diagnosis of a rare entity, clearly related in scientific publications with Cowden’s Syndrome.</span> </div>
