Thyroid-Like Low-Grade Nasopharyngeal Papillary Adenocarcinoma with Biphasic Histology

Figure 1

Thyroid-like low-grade papillary adenocarcinoma of nasopharynx demonstrates arborizing papilla (a); papillae have hyalinized fibro vascular core and are lined by a columnar epithelium (b, c). Solid component is made of spindle cells (d). Tumor cells are positive with CK19 (e) and TTF-1 (f).

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