Primary Neuroendocrine Tumor of the Parotid Gland: A Case Report and a Comprehensive Review of a Rare Entity

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left"> </td><td class="align_center">NEC parotid origin</td><td class="align_center">SmCC lung</td><td class="align_center">Merkel cell carcinoma</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">TTF-1</td><td class="align_center">−</td><td class="align_center">+</td><td class="align_center">−</td></tr><tr><td class="align_left">CK20</td><td class="align_center">+/−</td><td class="align_center">−</td><td class="align_center">+</td></tr><tr><td class="align_left">CK7</td><td class="align_center">+/−</td><td class="align_center">+</td><td class="align_center">−</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Immunohistochemical features that help in the differential diagnosis between NEC from the parotid, SmCC of the lung, and Merkel cell carcinoma. 

Case Reports in Otolaryngology

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Table 1

Table 1: Primary Neuroendocrine Tumor of the Parotid Gland: A Case Report and a Comprehensive Review of a Rare Entity 