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基底形瘤中EWSR1重组与附分化的基底形瘤

Carina A Dehner¹, Shruti Agrawal^2,3, Baptiste Ameline⁴

¹Department of Pathology, Indiana University School of Medicine, Indianapolis, Indiana, USA.

Genes, chromosomes & cancer

|June 13, 2025

概括

在年轻患者中,两种罕见的基底瘤意外地显示出EWSR1基因重组,这表明这些原始瘤与特定的遗传变化之间存在联系. 这一发现扩大了对皮肤副瘤多样性的理解,并有助于准确的诊断.

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:

皮肤附带性瘤通常是由基因融合引起的,通常表现为 poroid 或 hidradenomatous 的分化.
原始的基底性瘤,特别是毛囊性/毛囊性起源的瘤,较少与这种遗传驱动因素相关.

研究的目的:

描述两个原始基底性瘤原始基底性瘤的独特病例.
调查这些罕见瘤中潜在的分子遗传变化,特别是EWSR1重组.
为了提高诊断准确性,将组织病理学,免疫类型和分子发现联系起来.

主要方法:

组织病理学检查瘤形态,包括角质化和脂质分化.
对于质素,p40,p63和CD99的免疫组织化学染色.
分子分析以确定EWSR1的重组和特定的基因融合 (EWSR1::FLI1,EWSR1::PBX3).
甲基化分析以确定瘤分类和与已知的实体的关系.

主要成果:

两名年轻患者 (17F, 37M) 呈现了皮肤和皮下组织中的原始基底性瘤.
瘤显示基质细胞具有角质化或脂质分化,对角质素阳性,p40/p63,对CD99.9阴性.
第一个案例包含了EWSR1::FLI1合并;第二个案例包含了EWSR1::PBX3合并. 甲基化分析显示,病例1患有状细胞癌,病例2患有唾液腺瘤.

结论:

EWSR1的重组可能是原始基底瘤的原始驱动因素.
这些发现扩大了与基因融合相关的皮肤副瘤的范围.
准确的解释需要整合形态学,免疫类型和分子数据,以防止误诊为介质细胞瘤.

关键词:

EWSR1::FLI1 在线观看 EWSR1::PBX3 在线服务附带性瘤是指附带性瘤.

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