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Nonkeratinizing SCC. A A computed tomography scan demonstrates a soft tissue mass involving the nasal cavity and maxillary sinus, with bone erosion. B Tumor invasion is as smooth-edged lobules and ribbons, reminiscent of inverted papilloma. C This case harbored DEK::AFF2. Cases with this fusion typically have nuclear monotony and in infiltrate of neutrophils. D Nonkeratinizing SCC is characteristically positive for p40 in a diffuse pattern
