Abstract
DEK::AFF2 carcinoma of the sinonasal tract is an emerging entity. The tumor is typically characterized by papillary proliferation of non-keratinizing squamous epithelial cells with monotonous cytologic features, which may mimic other sinonasal tumors. The confirmation of this gene fusion has thus far relied solely on next-generation sequencing, fluorescence in situ hybridization (FISH), or reverse transcription polymerase chain reaction (RT-PCR). This current study aimed to validate an immunohistochemical assay for AFF2 C-terminus as an ancillary marker. We first analyzed publicly available RNA sequencing data of sinonasal tumors from the national center for biotechnology information (NCBI) sequence read archive and identified 3 DEK::AFF2 carcinomas out of 28 sinonasal tumors. The gene expression of AFF2 was significantly higher in the fusion-positive cases compared to the wild-type tumors (pā<ā0.001), while DEK was not. We then optimized an immunohistochemical assay with an anti-AFF2 C-terminus antibody for ancillary diagnosis. Seventeen DEK::AFF2 carcinomas, including 11 cases with predominantly low-grade morphology and one showing glandular differentiation, as well as 78 DEK FISH-negative sinonasal tumors were evaluated by AFF2 immunohistochemistry (IHC). Sixteen of the 17 DEK::AFF2 carcinomas showed nuclear AFF2 expression in ā„30% of tumor cells, including one decalcified case that failed FISH and RT-PCR confirmation. The one case that was negative for AFF2 IHC in the tumor cells also lacked expression in the internal positive control. It was thus considered a failure of the IHC rather than a truly negative case and was excluded from the statistical analysis. All DEK FISH-negative sinonasal tumors were negative for nuclear AFF2 expression. The nuclear expression of AFF2 IHC showed 100% sensitivity and specificity for DEK::AFF2 carcinoma. Accordingly, AFF2 IHC is a highly sensitive and specific ancillary marker that distinguishes DEK-AFF2 carcinoma from the other sinonasal tumors with overlapping morphological features and may be an especially useful alternative for decalcified specimens.
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Data availability
The data that support the findings of this study are available from the corresponding author upon reasonable request.
References
Yang, W., Lee, K.W., Srivastava, R.M., Kuo, F., Krishna, C., Chowell, D. et al. Immunogenic neoantigens derived from gene fusions stimulate T cell responses. Nat. Med. 25, 767ā775 (2019).
Todorovic, E., Truong, T., Eskander, A., Lin, V., Swanson, D., Dickson, B.C. et al. Middle ear and temporal bone nonkeratinizing squamous cell carcinomas with DEK-AFF2 fusion: an emerging entity. Am. J. Surg. Pathol. 44, 1244ā1250 (2020).
Bishop, J.A., Gagan, J., Paterson, C., McLellan, D., Sandison, A. Nonkeratinizing Squamous Cell Carcinoma of the Sinonasal Tract With DEK-AFF2: Further Solidifying an Emerging Entity. Am. J. Surg. Pathol. 45, 718ā720 (2021).
Kuo, Y.J., Lewis, J.S., Jr, Zhai C., Chen, Y.A., Chernock, R.D., Hsieh, M.S. et al. DEK-AFF2 fusion-associated papillary squamous cell carcinoma of the sinonasal tract: clinicopathologic characterization of seven cases with deceptively bland morphology. Mod. Pathol. 34, 1820ā1830 (2021).
Rooper LM, Agaimy A, Dickson BC, Dueber JC, Eberhart CG, Gagan J, et al. DEK-AFF2 Carcinoma of the Sinonasal Region and Skull Base: Detailed Clinicopathologic Characterization of a Distinctive Entity. Am. J. Surg. Pathol. 45, 1682ā1693 (2021).
Waldmann, T., Scholten, I., Kappes, F., Hu, H.G., Knippers, R. The DEK protein-an abundant and ubiquitous constituent of mammalian chromatin. Gene 343, 1ā9 (2004).
Riveiro-Falkenbach, E., Soengas, M.S. Control of tumorigenesis and chemoresistance by the DEK oncogene. Clin. Cancer Res. 16, 2932ā2938 (2010).
Teng, Y., Lang, L., Jauregui, C.E. The Complexity of DEK Signaling in Cancer Progression. Curr. Cancer Drug Targets 18, 256ā265 (2018).
Ishida, K., Nakashima, T., Shibata, T., Hara, A., Tomita, H. Role of the DEK oncogene in the development of squamous cell carcinoma. Int. J. Clin. Oncol. 25, 1563ā1569 (2020).
Wise-Draper, T.M., Draper, D.J., Gutkind, J.S., Molinolo, A.A., Wikenheiser-Brokamp, K.A., Wells, S.I. Future directions and treatment strategies for head and neck squamous cell carcinomas. Transl. Res. 160, 167ā177 (2012).
Adams, A.K., Hallenbeck, G.E., Casper, K.A., Patil, Y.J., Wilson, K.M., Kimple, R.J., et al. DEK promotes HPV-positive and -negative head and neck cancer cell proliferation. Oncogene 34, 868ā877 (2015).
Nakashima, T., Tomita, H., Hirata, A., Ishida, K., Hisamatsu, K., Hatano, Y. et al. Promotion of cell proliferation by the proto-oncogene DEK enhances oral squamous cell carcinogenesis through field cancerization. Cancer Med. 6, 2424ā2439 (2017).
Bensaid, M., Melko, M., Bechara, E.G., Davidovic, L., Berretta, A., Catania, M.V. et al. FRAXE-associated mental retardation protein (FMR2) is an RNA-binding protein with high affinity for G-quartet RNA forming structure. Nucleic Acids Res. 37, 1269ā1279 (2009).
Ge, H., Liu, K., Juan, T., Fang, F., Newman, M., Hoeck, W. FusionMap: detecting fusion genes from next-generation sequencing data at base-pair resolution. Bioinformatics 27, 1922ā1928 (2011).
Robinson, J.T., Thorvaldsdottir, H., Wenger, A.M., Zehir, A., Mesirov, J.P. Variant Review with the Integrative Genomics Viewer. Cancer Res. 77, e31āe34 (2017).
Dobin, A., Davis, C.A., Schlesinger, F., Drenkow, J., Zaleski, C., Jha, S., et al. STAR: ultrafast universal RNA-seq aligner. Bioinformatics 29, 15ā21 (2013).
Anders, S., Pyl, P.T., Huber, W. HTSeq-a Python framework to work with high-throughput sequencing data. Bioinformatics 31, 166ā169 (2015).
Bell, D., Bell, A.H., Kupferman, M.E., Prieto, V.G., Weber, R.S., Hanna, E.Y. Comparative transcriptome analysis of sinonasal inverted papilloma and associated squamous cell carcinoma: Out-HOXing developmental genes. Head Neck 41, 3090ā3104 (2019).
Saab-Chalhoub, M.W., Guo, X., Shi, Q., Chernock, R.D., Lewis, J.S., Jr Low Grade Papillary Sinonasal (Schneiderian) Carcinoma: A Series of Five Cases of a Unique Malignant Neoplasm with Comparison to Inverted Papilloma and Conventional Nonkeratinizing Squamous Cell Carcinoma. Head Neck Pathol. 15, 1221ā1234 (2021).
Lewis, J.S., Jr., Chernock, R.D., Haynes, W., El-Mofty, S.K. Low-grade papillary schneiderian carcinoma, a unique and deceptively bland malignant neoplasm: report of a case. Am. J. Surg. Pathol. 39, 714ā721 (2015).
Zhai, C., Wang, H., Li, S., Wang, D. Clinicopathological analysis of low-grade papillary Schneiderian carcinoma: report of five new cases and review of the literature. Histopathology 79, 370ā380 (2021).
Bishop, J.A., Brandwein-Gensler, M., Nicolai, P., Steens, S., Syjanen, S., Westra, W.H. Non-keratinizing squamous cell carcinoma, (eds El-Naggar, A.K., Chan, J.K.C., Grandis, J.R., Takata, T., Slootweg, P.J.). WHO Classification of Head and Neck Tumours. 4th edn. 15ā17 (IARC: Lyon, 2017).
Bishop, J.A., Guo, T.W., Smith, D.F., Wang, H., Ogawa, T., Pai, S.I. et al. Human papillomavirus-related carcinomas of the sinonasal tract. Am. J. Surg. Pathol. 37, 185ā192 (2013).
El-Mofty, S.K., Lu, D.W. Prevalence of high-risk human papillomavirus DNA in nonkeratinizing (cylindrical cell) carcinoma of the sinonasal tract: a distinct clinicopathologic and molecular disease entity. Am. J. Surg. Pathol. 29, 1367ā1372 (2005).
Larque, A.B., Hakim, S., Ordi, J., Nadal, A., Diaz, A., del Pino, M., et al. High-risk human papillomavirus is transcriptionally active in a subset of sinonasal squamous cell carcinomas. Mod. Pathol. 27, 343ā351 (2014).
Nudell, J., Chiosea, S., Thompson, L.D. Carcinoma ex-Schneiderian papilloma (malignant transformation): a clinicopathologic and immunophenotypic study of 20 cases combined with a comprehensive review of the literature. Head Neck Pathol. 8, 269ā286 (2014).
Bubola, J., MacMillan, C.M., Weinreb, I., Witterick, I., Swanson, D., Zhang, L., et al. A Poorly Differentiated Non-keratinizing Sinonasal Squamous Cell Carcinoma with a Novel ETV6-TNFRSF8 Fusion Gene. Head Neck Pathol. 15, 1284ā1288 (2021).
Agaimy, A., Hartmann, A., Antonescu, C.R., Chiosea, S.I., El-Mofty, S.K., Geddert, H. et al. SMARCB1 (INI-1)-deficient Sinonasal Carcinoma: A Series of 39 Cases Expanding the Morphologic and Clinicopathologic Spectrum of a Recently Described Entity. Am. J. Surg. Pathol. 41, 458ā471 (2017).
French, C.A. NUT Carcinoma: Clinicopathologic features, pathogenesis, and treatment. Pathol. Int. 68, 583ā595 (2018).
Bishop, J.A., Alaggio, R., Zhang, L., Seethala, R.R., Antonescu, C.R. Adamantinoma-like Ewing family tumors of the head and neck: a pitfall in the differential diagnosis of basaloid and myoepithelial carcinomas. Am. J. Surg. Pathol. 39, 1267ā1274 (2015).
Acknowledgements
The authors would like to thank the Biobank, Taipei Veterans General Hospital for assistance with sample preparation in this study. This study was presented in part at the annual meeting of the United States and Canadian Academy of Pathology on March 21st, 2022, Los Angeles, CA, USA.
Funding
The study was supported by the research grants from Taipei Veterans General Hospital (V110B-019) and the Ministry of Science and Technology, Taiwan (MOST110-2320-B-075-003-MY3).
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Y.J.K. and J.F.H. performed the study concept and design, analyzed the data, and wrote the paper; Y.C.Y. and J.F.H. conducted bioinformatics analysis of the RNAseq data; Y.J.K., J.S.L., T.T., R.D.C., C.Z., Y.A.C., T.H., C.K.L., Q.S., J.M.V., A.B.G., Y.H.C., M.S.H., A.H., and J.F.H. provided specimen acquisition and clinical data; J.F.H. supported immunohistochemistry and molecular methodology; J.S.L., R.D.C., and I.W. performed critical review and editing. All authors read and approved the final paper.
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The study was approved by the institutional review board (IRB) of Taipei Veterans General Hospital (IRB no.: 2020-12-012CC).
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Kuo, YJ., Lewis, J.S., Truong, T. et al. Nuclear expression of AFF2 C-terminus is a sensitive and specific ancillary marker for DEK::AFF2 carcinoma of the sinonasal tract. Mod Pathol (2022). https://doi.org/10.1038/s41379-022-01117-4
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DOI: https://doi.org/10.1038/s41379-022-01117-4