case_images: PMC4531653_01
case_images: A computed tomographic scan of the neck shows a soft tissue mass in oropharynx.
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case_images: A computed tomographic (CT) scan of the neck showed a soft tissue mass in both oropharynx, soft palate and posterior laryngeal wall, and multiple lymph node enlargements of both cervical areas (Figure 1).
case_images: Light microscopic examination shows an atypical small irregular shaped lymphoid cell infiltration admixed with plasma cells, neutrophils and eosinophils (H & E, x100). Immunohistochemical staining shows a positivity for CD56 and typical angiocentricity (inlet, x100).
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case_images: On immunophenotyping study, CD56 and cytoplasmic CD3 were positive and CD20 was negative (Figure 2).
case_images: Light microscopic findings of the hard palate mass show moderately differentiated squamous cell carcinoma (H & E, x100) and p53 immunoreactivity (inlet, x100).
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case_images: Unexpectedly, the biopsy revealed a moderately differentiated squamous cell carcinoma with a p53 immunoreactivity (Figure 3).