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First Report of Thoracic Carcinoma With DEK::AFF2 Rearrangement: A Case Report

Overview
Journal J Thorac Oncol
Publisher Elsevier
Specialties Oncology
Pulmonary Medicine
Date 2022 Jun 30
PMID 35773081
Authors
Omid Savari
Jason C Chang
Justin A Bishop
Muthu Kumar Sakthivel
Frederic B Askin
Natasha Rekhtman
Affiliations
Soon will be listed here.
Abstract

DEK::AFF2 carcinomas of the head and neck region have been recently described and reported to have aggressive clinical behavior but exceptional sensitivity to immunotherapy. We report a case of a 26-year-old female, never smoker, with a 5.2-cm left lower lobe central lung mass, with morphologic features identical to those reported for DEK::AFF2 head and neck carcinomas, including mixed papillary exophytic and invasive components, squamous/basaloid features, and monomorphic cytomorphology. DEK (exon 7)::AFF2 (exon 9) fusion was identified by whole-transcriptome RNA sequencing. This is the first report of thoracic DEK::AFF2 carcinoma, indicating that these tumors are not confined to the head and neck region but can involve both upper and lower respiratory tracts. This entity should be considered in the differential diagnosis of squamous cell carcinomas in never smokers lacking other known oncogenic mutations.

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