ReviewHead and neck pathology2024
DEK::AFF2 Fusion-Associated Squamous Cell Carcinoma: A Case Series with Literature Review on an Emerging and Challenging Entity.
Review in Head and neck pathology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- DEK::AFF2 Fusion-Associated Nonkeratinizing Squamous Cell Carcinoma with Noncontiguous Middle Ear and Sinonasal Involvement.Head and neck pathology · 2026Article
- Malignant Transformation of Sinonasal Papilloma: Assessment of Clinicopathologic Features, p16 and p53 Expression, Transcriptionally Active HPV Status and Underlying Molecular Alterations.Head and neck pathology · 2026Article
- Expanding the spectrum of AFF2 carcinoma: clinical, morphological, immunohistochemical, and molecular characteristics of five cases harboring alternate fusions.Virchows Archiv : an international journal of pathology · 2026Article
- Resistance mechanism to pembrolizumab inInternational cancer conference journal · 2025Article
- Primary Laryngeal Squamous Cell Carcinoma with DEK::AFF2 Fusion: The First Case Report.Head and neck pathology · 2025Article
- Hiding in plain sight: NUT carcinoma is an unrecognized subtype of squamous cell carcinoma of the lungs and head and neck.Nature reviews. Clinical oncology · 2025Review
- DEK::AFF2 rearranged neoplasm with undifferentiated morphology and neuroendocrine phenotype in a pediatric patient.Virchows Archiv : an international journal of pathology · 2025Article
- Case Report: "Frontiers in immunology · 2025Article
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Authors and funding
7 authors.
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No grant is acknowledged in the PubMed record.
Abstract
purposeDEK::AFF2 fusion-associated squamous cell carcinoma (DEK::AFF2 SCC), also reported in the literature as low-grade papillary sinonasal (Schneiderian) carcinoma (LGPSC), is a rare, primarily bland-appearing, but locally aggressive neoplasm. Morphologically, these tumors can closely resemble sinonasal papilloma (SP), especially on small or limited biopsy, often leading to misdiagnosis. DEK::AFF2 SCC is devoid of the underlying mutually exclusive EGFR or KRAS driver mutations of SP, suggesting it may represent a distinct unique entity.
methodsIn this study, we conducted a retrospective search of "unusual" SP reported either as atypical, dysplastic, or suspicious for malignant transformation at our institution in the last 13 years (2010-2023), to identify potential cases of DEK::AFF2 SCC.
resultsOf the 201 SP cases during this time period, 30 "unusual" SP cases were identified. On morphologic review of these 30 cases, 6 were worrisome for DEK::AFF2 SCC and were selected for AFF2 immunohistochemical stain (IHC), of which 3 cases were positive. All 3 AFF2 IHC positive cases were also positive for DEK::AFF2 fusion by fluorescence in situ hybridization (FISH), thereby, confirming IHC results.
conclusionsThis study highlights that AFF2 IHC can be an invaluable surrogate marker to FISH in identifying DEK::AFF2 SCC in challenging cases to avoid misdiagnosis. Detailed clinical and pathologic data were collected to gain a better understanding of this emerging challenging entity. A literature review was performed to enrich our knowledge of DEK::AFF2 SCC.
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