Clinical Next-Generation Sequencing Panels Reveal Molecular Differences Between Merkel Cell Polyomavirus-Negative Merkel Cell Carcinomas and Neuroendocrine Carcinomas

被引:5
|
作者
Hartsough, Emily [1 ,2 ]
Mino-Kenudson, Mari [1 ,2 ]
Lennerz, Jochen K. [1 ,2 ]
Dias-Santagata, Dora [1 ,2 ]
Hoang, Mai P. [1 ,2 ]
机构
[1] Massachusetts Gen Hosp, Dept Pathol, Boston, MA 02114 USA
[2] Harvard Med Sch, Boston, MA 02115 USA
关键词
Molecular analyses; Merkel cell carcinoma; Neuroendocrine carcinoma; Next-generation sequencing; Fusion analyses; UV signature; TMPRSS2-ERG GENE FUSION; LUNG-CARCINOMA; EML4-ALK REARRANGEMENT; MUTATIONAL LANDSCAPE; ALK-REARRANGEMENT; PARTIAL-RESPONSE; IDENTIFICATION; PULMONARY; ADENOCARCINOMA; CANCER;
D O I
10.1093/ajcp/aqac176
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
Objectives We aim to determine molecular differences between Merkel cell polyomavirus (MCPyV)-negative Merkel cell carcinomas (MCCs) and neuroendocrine carcinomas (NECs). Methods Our study included 56 MCCs (28 MCPyV negative, 28 MCPyV positive) and 106 NECs (66 small cell NECs, 21 large cell NECs, and 19 poorly differentiated NECs) submitted for clinical molecular testing. Results APC, MAP3K1, NF1, PIK3CA, RB1, ROS1, and TSC1 mutations, in addition to high tumor mutational burden and UV signature, were frequently noted in MCPyV-negative MCC in comparison to small cell NEC and all NECs analyzed, while KRAS mutations were more frequently noted in large cell NEC and all NECs analyzed. Although not sensitive, the presence of either NF1 or PIK3CA is specific for MCPyV-negative MCC. The frequencies of KEAP1, STK11, and KRAS alterations were significantly higher in large cell NEC. Fusions were detected in 6.25% (6/96) of NECs yet in none of 45 analyzed MCCs. Conclusions High tumor mutational burden and UV signature, as well as the presence of NF1 and PIK3CA mutations, are supportive of MCPyV-negative MCC, whereas KEAP1, STK11, and KRAS mutations are supportive of NEC in the appropriate clinical context. Although rare, the presence of a gene fusion is supportive of NEC.
引用
收藏
页码:395 / 406
页数:12
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