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具有母体分化的皮肤杂交囊大多是零星的,并且与CTNNB1突变有关
Corentin Ly Thai Bach1,2, Anne Tallet3, Christine Bonenfant3
1Department of Pathology, Université de Tours, Centre Hospitalier Universitaire de Tours, Tours, France.
Virchows Archiv : an international journal of pathology
|November 23, 2024
概括
混合囊,罕见的副瘤,主要是由CTNNB1基因突变引起的,而不是与家族腺多重症相关的APC突变. 这些发现澄清了这些独特的皮肤病变的致病性.
科学领域:
- 皮肤病理学 皮肤病理学
- 在瘤学瘤学.
- 分子遗传学 分子遗传学
背景情况:
- 带有矩阵分化的尾瘤,如皮洛马特里科马,通常在CTNNB1或APC基因中表现出突变,激活Wnt/βcatenin通路.
- 皮洛马里科马通常随着CTNNB1突变偶尔出现,而表皮和母体分化的混合囊偶尔与家族腺多重症/加德纳综合征中的APC生殖系突变有关.
研究的目的:
- 阐明表皮和母体分化表现出混合囊的潜在病原性.
- 与典型的pilomatricomas相比,区分推动混合囊形成的遗传和分子机制.
主要方法:
- 追溯分析2015年至2023年期间诊断的287例pilomatricoma/混合囊病例.
- 将瘤分为pilomatricomas或混合囊的分类,然后对临床和显微特征进行比较.
- 针对βcatenin的免疫组织化学和混合囊中CTNNB1和APC基因的测序.
主要成果:
- 混合囊占分析队列的4% (10/287),没有家族腺瘤多重症的个人或家族史.
- 在大多数混合囊 (90%) 的母体成分中观察到贝塔凯宁核表达,但在80%的病例中,在表皮成分中没有观察到.
- 在所有可评估的杂交囊 (7/10) 中都发现了体内CTNNB1突变,只有一个病例显示了与CTNNB1突变一起具有不确定的意义的APC变异.
结论:
- 混合囊是一种罕见的副瘤.
- 这项研究表明,零星的CTNNB1体质突变是大多数混合囊的致病的主要驱动因素,将其与APC相关的综合征区分开来.
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