PMC4441364_01
Nasopharyngeal fiberscopic findings (at the initial examination). An oval tumor with a grooved surface occupied the nasopharynx, but did not cause an Eustachian orifice.
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The initial clinical findings following nasopharyngeal fiberscopy included the presence of an oval tumor with a grooved surface in the nasopharynx, which was not associated with the Eustachian orifice (Fig. 1A, B).
CT (noncontrast). A cystic lesion that had its basal part on the median in the nasopharynx was detected. A part of the lesion was fluid-filled. In MRI, a cystic lesion was detected, the contents of which were hypointensive and relatively hyperintensive on the T1- and T2-weighted images, respectively.
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A cystic lesion was detected by magnetic resonance imaging (MRI), the contents of which were hypointense and relatively hyperintense on the T1- and T2-weighted images, respectively (Fig. 2).
Histopathological findings. H&E staining under (A) low magnification and (B) high magnification: A lymphatic structure including expansion of the crypt, as well as inflammatory cell infiltration and follicular hyperplasia, was detected. (C) CD4; (D) CD8; (E) CD20; (F) BCL-2; (G) CKAE1AE3.
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The histopathological findings following hematoxylin-eosin (H&E) staining included the detection of lymphoid tissue accompanied by expansion of the crypt, as well as inflammatory cell infiltration and follicular hyperplasia (Fig. 3A, B). Also, the expression of CD8 and BCL-2 was detected, which indicated continued immune function of the pharyngeal tonsils in an individual over the age of 50 (Fig. 3C, D, E, F, and G).
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